Posted on March 22nd, 2026

The Ratios, Grind, and the Best Beans from a Madison, CT Small Batch Roaster

Why cold brew is made for spring

As spring warms up the shoreline, cold brew becomes the smooth, low acid way to enjoy specialty coffee over ice. Unlike iced coffee brewed hot and rapidly chilled, cold brew is extracted with cool water over many hours—coaxing out round sweetness and minimizing bite.

At Evolution, our small‑batch, roast‑to‑order approach and Fair Trade & Organic sourcing mean you’re starting with fresher beans and cleaner flavors—exactly what cold brew loves. (Freshness and ethical sourcing are core to your brand values.)

Two easy paths (pick your style)

1) Classic immersion concentrate (most flexible)

If you’ve seen countertop brewers like HomsHug , OXO or Toddy, you’ve seen immersion in action. You steep coarsely ground coffee under water, strain, then dilute to your taste.

Starting ratio & timing (home‑friendly):

• Ratio: Start around → 1 : 4 to 1 : 5 (coffee: water by weight). (Example: 250 g coffee : 1000–1250 g water) for a rich concentrate.
• Brew time: 12–24 hours (shorter at room temp, longer in the fridge).
• Dilution: Start at 1:2 or 1:3 (concentrate: water/milk) over ice and adjust.
• Grind: Go coarse, similar to French press, to avoid over‑extraction and sediment
• Water: Filtered water keeps flavors clean.

2) Ready‑to‑drink cold brew (lighter, super simple)

Prefer to skip dilution math and pour straight from the fridge?

• HomsHug 34oz recipe: 80 g coffee : ~1000 mL water (~1:12.5) steeped ~8 hours in the fridge. It produces a balanced, ready‑to‑drink brew out of the gate

This path is excellent for brighter origins you want to sip black.

Evolution beans picks for cold brew

• Brazil FTO – Chocolate , hazelnut, and caramel notes = the archetypal, crowd‑pleasing cold brew. Great as concentrate or ready‑to‑drink.
• Ethiopia Yirgacheffe – Fruit‑forward and aromatic; shines in ready‑to‑drink ratios (or dilute your concentrate a touch more).
• Sumatra ACEH Organic – Velvety body and spice; superb for nitro or when you want cream‑friendly cups.

The 10‑minute prep: Step‑by‑step (Immersion)

1. Weigh & grind
1. Start with 250 g beans, ground coarse.
2. Bloom & fill
1. Add coffee to your brewer, wet all grounds (brief bloom), then add water to reach 1000–1250 g total (your chosen 1:4–1:5).
3. Steep
1. 12–24 hours (countertop = faster; fridge = slower, often “cleaner”).
4. Drain & filter
1. Strain per your device instructions (paper + mesh yields the cleanest cup).
5. Dilute & serve
1. Start at 1:2 concentrate to water/milk over ice; adjust to taste.

Troubleshooting (fast fixes)

• Too strong / syrupy → Dilute more (try 1:3).

• Mud or grit → Add a paper filter step or grind coarser.

• Flat flavor → Use filtered water and fresher beans; shorten storage time.

A quick word on cold brew vs. iced coffee

If you like more sparkle/brightness, try Japanese‑style iced coffee(brew hot over ice). Cold brew offers plush sweetness; iced coffee brewed hot brings sharper aromatics. Different tools for different moods.

Storage & food safety (simple)

Keep concentrate refrigerated in an airtight container. Enjoy peak flavor within 2–5 days; many guides suggest up to 7–14 days for concentrate if kept cold and airtight. Prediluted brews taste best within 2–3 days.

Spring serves to try

• Citrus‑Tonic Cold Brew: 1 part concentrate + 3 parts chilled tonic, wide orange peel.
• Maple Cold Foam: Shake oat milk with a touch of maple syrup; float over ready‑to‑drink brew.
• Lavender & Vanilla: 1:2 concentrate to water over ice, ½ oz lavender syrup, dash vanilla.

FAQ

What ratio should I start with?
1:4–1:5 for a concentrate you’ll dilute 1:2–1:3 over ice.

How long should I steep?
12–24 hours for immersion; about 8 hours for 1‑liter ready‑to‑drink brewers.

Which roast works best?
Medium to medium‑dark enhances sweetness/body; fruit‑forward light roasts shine at ready‑to‑drink ratios.

Pick your roast, follow the guide, and taste the evolution—smooth, low‑acid, and ethically sourced.

About the author
Walter Mori is a Manufacturing Engineer and coffee roaster at Evolution Coffee Roasters. He tests brew methods, calibrates grinders, and develops roast profiles to help home brewers get café‑quality results.

Have questions about this blog "Cold Brew at Home: The Spring Guide", or want to chat over coffee? Reach out anytime at w[email protected] 

👉 "Here's where to start."