Cold brew and nitro coffee are high-margin menu staples, but they need the right brewing, kegging, and dispensing gear. This guide covers cold brew systems, steep times and ratios, kegging, nitro on tap, and iced coffee equipment.
Cold brew is coffee steeped in cold or room-temperature water for many hours rather than brewed with hot water. The long, cool extraction pulls out flavor with less acidity and bitterness, giving a smooth, naturally sweet cup. It is typically brewed as a concentrate using coarse grounds and a high coffee-to-water ratio, then diluted with water or milk to serve. Because no heat is used, the process is slow, usually 12 to 24 hours, but it produces a shelf-stable concentrate you can batch ahead. It is a popular, high-margin summer and year-round menu item.
Iced coffee is brewed hot and then chilled or poured over ice, so it keeps the brighter acidity and aromatics of hot coffee but can taste watered down as the ice melts. Cold brew is never heated; it steeps cold for many hours, producing a smoother, less acidic, more concentrated drink. Cold brew takes far longer to make but stores well as a concentrate, while iced coffee is fast but best served fresh. Flash-brewed (Japanese-style) iced coffee is a hybrid, brewed hot directly onto ice to lock in aroma.
Most cold brew steeps for 12 to 24 hours, with about 16 to 18 hours a common target; the exact time varies by grind, ratio, temperature, and taste. Steeping at room temperature extracts faster than in the refrigerator, so many cafes refrigerate for food safety and steep toward the longer end. Under-steeping tastes weak and sour; over-steeping past about 24 hours can turn woody or bitter. Taste-test near your target and strain promptly once it hits the flavor you want. Standardize your time so batches stay consistent.
For concentrate, common ratios run from about 1:4 to 1:8 coffee to water by weight, then you dilute to taste at service, often around 1:1 with water or milk. A stronger concentrate (near 1:4) stores compactly and gives flexibility; a weaker ratio (near 1:8) may be closer to ready to drink. Use a coarse grind, similar to raw sugar, to avoid over-extraction and cloudiness and to filter cleanly. Dial in your ratio and dilution once, write it down, and repeat it so every batch tastes the same.
At minimum you need a food-grade brewing vessel with a filter, refrigeration to hold the batch and concentrate, and containers for storage. Options scale from simple bucket-and-filter-bag or Toddy-style systems, to purpose-built cold brew brewers with built-in filtration, to large batch systems and cold brew kegs for higher volume. You also need a coarse grinder or coarsely ground coffee, a scale for consistent ratios, and refrigerated storage. For nitro or draft cold brew, add kegs, a regulator, and a tap. Match capacity to your daily cold brew sales.
Nitro cold brew is cold brew coffee infused with nitrogen gas and dispensed through a pressurized tap with a restrictor plate, similar to a nitro stout. The tiny nitrogen bubbles create a cascading, creamy pour with a thick, foamy head and a smooth, naturally sweet mouthfeel, often served without ice or dairy. Nitrogen, unlike CO2, does not dissolve much or add carbonation or sourness, so it adds texture rather than fizz. Nitro is a premium, high-margin menu item that draws attention at the tap and photographs well.
You need cold brew in a keg, a nitrogen (or beer-gas blend) tank with a regulator, a gas line, a refrigerated kegerator or draft box to keep the keg cold, and a stout faucet with a restrictor disc that creates the cascade. Some operators use a nitro infuser or charge the keg with nitrogen; others buy pre-nitrogenated kegs. Keep everything refrigerated and clean the lines and faucet regularly. A single-tap nitro setup is a manageable add-on; multi-tap systems suit high volume or several cold beverages.
Nitro coffee uses nitrogen, either pure nitrogen or a beer-gas blend (commonly around 70 percent nitrogen and 30 percent CO2), pushed through a stout faucet with a restrictor plate. Nitrogen is used because it barely dissolves into liquid, so it adds creamy texture and a cascading head without the carbonated fizz or acidity that CO2 would add. Do not run a nitro tap on plain CO2, which would carbonate the coffee and taste sharp. The exact blend and pressure vary by setup, so follow your gas supplier's and equipment maker's guidance.
Nitro and beer-gas systems typically run at a higher pressure than a standard CO2 draft line, often in the range of roughly 30 to 40 psi, because nitrogen is not very soluble and needs pressure to push through the restrictor plate and create the cascade; the exact setting varies by keg, line length, temperature, and faucet. Keep the keg cold, around 34 to 40 degrees F. If the pour is flat or too foamy, adjust pressure in small steps and check line balance. Follow your equipment and gas supplier's recommended settings.
Yes. Sparkling (carbonated) cold brew uses CO2, not the nitrogen behind nitro, so it comes out fizzy and bright like a coffee soda rather than creamy. You force-carbonate filtered cold brew in a keg by chilling it and applying CO2 at roughly 30 to 40 psi for a day or so, or use an inline carbonator, then serve very cold through a standard beverage faucet. Adjust pressure and carbonation to taste, and keep everything cold and clean. Carbonated and nitro cold brew are different products made with different gases and faucets.
Two keg styles are common: Cornelius (Corny) kegs, the stainless ball-lock or pin-lock kegs used by homebrewers, which are easy to open, fill, and clean by hand, and commercial Sanke-style kegs that use a single coupler. Corny kegs in 2.5 or 5 gallon sizes suit most cafes because you can scrub them out between batches. Use food-grade stainless kegs, sanitize thoroughly, and label each fill with the date. Match keg size to how fast you sell cold brew so it stays fresh, and keep spares so one can clean while another serves.
Cold brew concentrate kept refrigerated typically stays good for about 7 to 14 days, while diluted, ready-to-drink cold brew is best within a few days because dilution and added milk shorten shelf life; exact times vary by handling and storage temperature. Kegged cold brew held cold and sealed can last a couple of weeks. Always refrigerate, label with the brew or fill date, and follow first-in, first-out rotation. Discard anything that smells or tastes off. Your local health code and your own tasting should guide date marking and holding times.
Yes. Because cold brew is not pasteurized and can support microbial growth over time, keep it refrigerated at 41 degrees F or below during steeping (or steep at room temperature only for the intended window), storage, and service. Refrigerating the steep is the safer choice and is often expected by inspectors. Kegs, dispensers, and lines must be kept cold and cleaned on schedule. Label batches with dates and rotate stock. Treat cold brew like any other perishable ready-to-drink beverage under your food-safety plan, not as a shelf-stable product.
Concentrate is strong cold brew made with a high coffee-to-water ratio, meant to be cut with water, milk, or a milk alternative before serving. Brewing concentrate saves refrigerator space and gives flexibility for iced coffee, lattes, and blended drinks. A common dilution is around 1:1 concentrate to water, but you tune it to your recipe and beans. Standardize the dilution so drinks are consistent, and post the recipe at the station. Selling concentrate by the bottle or growler for retail is also a possible added revenue stream if your permits allow.
A stout (nitro) faucet is a specialized tap with a restrictor plate, a small disc with tiny holes, that forces the nitrogenated liquid through at high pressure, breaking it into fine bubbles and creating the signature cascade and creamy head. Standard beer or beverage faucets cannot produce this effect. Nitro faucets are used for nitro cold brew, nitro stouts, and some nitro teas. They must be cleaned regularly because the small holes clog. Pair the stout faucet with a nitrogen or beer-gas source and a refrigerated keg for proper pours.
Costs vary widely by scale. A basic single-tap setup with a kegerator or draft box, nitrogen tank and regulator, keg, and stout faucet can run roughly 1,000 to 3,000 dollars, while multi-tap draft systems, built-in nitro infusers, and larger refrigeration push costs higher. You also have ongoing costs for nitrogen gas, kegs, and cleaning supplies. Buying pre-nitrogenated kegs avoids infuser equipment but adds per-keg cost. Weigh the equipment investment against the strong margins nitro drinks command. Prices depend on brand, capacity, and whether you buy new or used.
For small volume or catering, whipped-cream-style chargers with nitrogen (N2) cartridges in a dispenser can produce single servings of nitro-style coffee, and countertop nitro dispensers exist for low-throughput settings. These are simpler and cheaper than a full draft system but do not match the volume, consistency, or presentation of a kegged stout-faucet setup. For a cafe serving nitro regularly, a keg and tap system is more efficient and reliable. Use single-serve chargers for testing the menu item, events, or very light demand before investing in a draft system.
Use a coarse grind, roughly the texture of raw or coarse sugar. A coarse grind extracts slowly and evenly over the long steep, avoids over-extraction and bitterness, and filters cleanly so the concentrate is not muddy or gritty. Fine grounds over-extract, clog filters, and leave sediment. If your cold brew tastes harsh or looks cloudy, your grind is likely too fine. A dedicated grinder or coarsely ground coffee works; consistency of grind size matters for a clean, sweet result. Coarse and uniform is the goal.
Most systems use a two-stage approach: a coarse filter (a fine-mesh bag, basket, or reusable filter) to remove the bulk of the grounds, then a finer filter (paper, felt, or a polishing filter) to clean up sediment for a clear concentrate. Purpose-built cold brew brewers have integrated filtration. A cleaner filter step gives a smoother, less gritty drink and protects taps and lines from clogging, which matters for kegged and nitro cold brew. Rinse and sanitize reusable filters between batches, and replace paper or worn filters as needed.
Flash brewing (Japanese-style iced coffee) means brewing hot coffee directly onto ice, so it chills instantly. You brew a stronger batch to account for the ice melt that dilutes it. Unlike cold brew, it keeps the bright acidity and aromatics of a hot brew but is served cold and made in minutes rather than hours. It works with drip, pour-over, or batch brewers set up to brew over ice. Flash brew suits cafes that want fresh iced coffee fast without steeping overnight, though it does not store like cold brew concentrate.
Yes. Many commercial batch brewers can brew a concentrated batch directly over ice (flash brewing) or brew a strong batch to chill and serve over ice later. Some brewers have an iced-coffee setting that adjusts the recipe for ice melt. Brew stronger than usual so the melting ice does not dilute the drink to weakness. For consistency, standardize the recipe and ice amount. This is a fast, low-equipment way to offer iced coffee alongside hot, complementing rather than replacing a slower cold brew program. See our coffee brewer guide for choosing a machine.
Size batches to your sales so concentrate is used within its safe, fresh window (roughly 7 to 14 days refrigerated for concentrate) and you are not scrambling mid-day. Track daily cold brew cups sold, convert to concentrate volume using your dilution recipe, and brew a few days' supply at a time. Because steeping takes 12 to 24 hours, brew on a rolling schedule so a fresh batch is always ready. Over-brewing wastes coffee to spoilage; under-brewing means running out. Adjust batch size seasonally, since cold brew demand spikes in warm months.
Because cold brew is unpasteurized and often served ready to drink, the main concerns are temperature control, cleaning, and date marking. Keep it at 41 degrees F or below through steeping, storage, and service; clean and sanitize brewers, kegs, couplers, lines, and taps on schedule; and label batches with dates and rotate first-in, first-out. Nitro lines and stout faucets need regular cleaning because residue and the restrictor holes harbor buildup. There have also been safety notes about dispensing systems and dissolved gases, so follow equipment and local health-code guidance for your setup.
Serving coffee, cold brew, and nitro coffee generally falls under your standard food-service permit rather than a special license, but rules vary by state and locality, and dispensing equipment may be subject to health-code review during plan review or inspection. Nitrogen gas storage and handling can carry workplace-safety requirements. Bottling or wholesaling cold brew for retail sale usually triggers additional processing and labeling rules. Check with your local health department about your specific setup, especially draft and kegged systems, and confirm requirements before you build out the equipment.
Nitro pours are sensitive to pressure, temperature, and line balance. Too foamy often means the pressure is too high, the keg or lines are too warm, or the faucet is dirty; too flat can mean pressure is too low, the keg needs more nitrogen conditioning, or the restrictor plate is clogged. Keep the keg cold (around 34 to 40 degrees F), verify your gas blend and pressure against the equipment maker's specs, and clean the faucet and restrictor regularly. Adjust one variable at a time and let the system settle before re-pouring.
Still cold brew can be dispensed from a refrigerated bulk beverage dispenser or a keg pushed with low-pressure nitrogen, but do not run it as a carbonated drink through a CO2 soda system, which would add fizz and sourness. Nitro cold brew specifically requires nitrogen and a stout faucet to get the cascade, so a normal beverage tap will not produce the effect. Whatever the dispenser, keep it cold and clean it on schedule. For choosing dispensing hardware, see our beverage dispenser guide.
Clean beverage lines, couplers, and faucets regularly with a dedicated line-cleaning solution, following the same discipline used for draft beverages, because coffee oils and residue build up and turn rancid and can clog the stout faucet's restrictor holes. Disassemble and soak the faucet and restrictor plate, brush the holes clear, and flush the lines. Sanitize kegs between fills. How often depends on volume, but a set weekly or per-keg cleaning schedule is a good baseline. Skipping cleaning causes off flavors, poor pours, and sanitation violations.
Cold brew and especially nitro cold brew typically command premium menu prices while using a modest amount of coffee per serving as concentrate, so margins can be strong. The trade-offs are longer preparation time, refrigerated storage, spoilage risk if you over-brew, and equipment cost for draft or nitro systems. Labor for batching and cleaning also factors in. Many cafes find cold brew a high-margin complement to hot coffee, particularly in warm months. Run the numbers on your coffee cost per cup, dilution, waste, and equipment payback before pricing the menu.
Yes. The same nitrogen gas, kegs, and stout faucet setup that serves nitro cold brew can dispense nitro tea, nitro lemonade, and other still beverages you want to give a creamy, cascading texture. This lets you diversify the menu without buying separate equipment, though each product needs its own keg and clean lines, and flavors can carry over if lines are shared without thorough cleaning. Dedicate or thoroughly clean lines between different products. Nitro tea and similar drinks are a low-cost way to expand a premium draft beverage menu.
Start small: a bucket-and-filter or Toddy-style brewer and refrigerated storage take little room and require no draft equipment, letting you offer poured-over-ice cold brew from concentrate. As demand grows, add a single-tap kegerator for still or nitro cold brew, which fits under a counter. Brew on a rolling schedule so you always have a fresh batch. Keep the recipe standardized and storage cold. This staged approach controls cost and space while you gauge demand. Planning a new shop from scratch? See our coffee shop opening guide.