Butter Yield
7.0 oz
Sticks
1.8
Buttermilk
1.2 cups
Net cost accounts for buttermilk value (~$1.73)
| Method | Shelf Life | Temp |
|---|---|---|
| Refrigerator (washed) | 2–3 weeks | 35–40°F |
| Refrigerator (unwashed) | 3–5 days | 35–40°F |
| Freezer | 6–9 months | 0°F |
| Clarified (ghee) | 3–6 months | Room temp |
Washing removes residual buttermilk that causes spoilage. Always wash 3x with ice water for maximum shelf life.
| Cream Type | Fat % | Butter (oz) | Sticks |
|---|---|---|---|
| Light Cream | 20% | 3.9 | 1.0 |
| Whipping Cream | 30% | 5.9 | 1.5 |
| Heavy Cream | 36% | 7.0 | 1.8 |
| Double Cream (UK) | 48% | 9.4 | 2.3 |
Inputs
Result
Two cups (1 pint) of heavy cream at 36% fat yields about 7 oz of butter and 1.2 cups of buttermilk. After subtracting the buttermilk value ($1.73), the net cost is $2.27 for roughly 1.8 sticks.
Inputs
Result
Four cups of whipping cream produce about 11.7 oz of butter. Add 0.83 tsp of salt after washing. The food processor method takes just 3–5 minutes. Net cost after buttermilk credit is $4.22.
Inputs
Result
One cup of double cream at 48% fat yields 4.7 oz of cultured butter after a 12–24 hour fermentation. Jar shaking takes 15–25 minutes but is a fun hands-on approach. The high fat content gives the best butter yield per volume.
One pint (2 cups) of heavy cream at 36% fat yields about 7 oz of butter, which is roughly 1.8 sticks. You also get about 1.2 cups of real buttermilk as a byproduct. The exact yield depends on cream fat content — higher fat means more butter.
| Cream Type | Fat % | Butter from 2 Cups | Sticks |
|---|---|---|---|
| Light Cream | 20% | 3.9 oz | ~1.0 |
| Whipping Cream | 30% | 5.9 oz | ~1.5 |
| Heavy Cream | 36% | 7.0 oz | ~1.8 |
| Double Cream (UK) | 48% | 9.4 oz | ~2.3 |
Churning time ranges from 3 minutes with a food processor to 40 minutes with a traditional churn. A stand mixer with a whisk attachment takes 5–10 minutes at medium-high speed. Jar shaking takes 15–25 minutes. Cream temperature is critical — 55–60°F churns fastest.
| Method | Time | Difficulty | Best For |
|---|---|---|---|
| Food Processor | 3–5 min | Easy | Quick batches |
| Stand Mixer | 5–10 min | Easy | Regular use |
| Jar Shaking | 15–25 min | Moderate | Kids/fun |
| Traditional Churn | 20–40 min | Hard | Tradition |
Store butter costs about $5/lb (4 sticks). Making butter from heavy cream costs about $8/lb in cream, but you also get roughly 1 cup of real buttermilk per pint worth ~$1.50. Accounting for buttermilk value, DIY butter costs about $5–$6/lb net — roughly break-even with store-bought, but with superior freshness.
| Item | DIY Cost | Store Price | Notes |
|---|---|---|---|
| Butter (1 lb) | $5–$6 net | $5–$6 | Break-even for standard |
| Cultured Butter | $6–$7 net | $8–$12 | DIY saves 30–50% |
| Buttermilk (bonus) | Free byproduct | $3/pint | Offsets cream cost |
Butter yield = cream volume × (cream fat % ÷ 82%). Standard butter is 82% milkfat, so the formula calculates how much of the cream’s fat content converts to butter. For heavy cream at 36% fat: yield = cream × (0.36 / 0.82) = cream × 0.439, meaning about 44% of the cream volume becomes butter.
Washing removes residual buttermilk trapped in the butter. Buttermilk contains milk sugars and proteins that cause rancidity and spoilage within days. Properly washed butter lasts 2–3 weeks refrigerated vs 3–5 days unwashed. Wash at least 3 times with ice water until the water runs completely clear.
Cultured butter is made by fermenting cream with live bacterial cultures (like yogurt or buttermilk starter) for 12–24 hours before churning. The bacteria convert lactose to lactic acid, giving the butter a tangy, complex flavor similar to European-style butter. Add 2 tablespoons of cultured buttermilk per pint of cream and let sit at 72°F.
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Last Updated: Mar 9, 2026
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