Dairy & Eggs
Sour Cream Conversion
Sour Cream weighs 230g per US cup.
| Amount | Grams | Ounces |
|---|---|---|
| 1 cup | 230.0 g | 8.11 oz |
| 1/2 cup | 115.0 g | 4.06 oz |
| 1/4 cup | 57.5 g | 2.03 oz |
| 1 tbsp | 14.4 g | 0.51 oz |
| 1 tsp | 4.8 g | 0.17 oz |
| 100 g | 100.0 g | 3.53 oz |
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Sour cream's 230g per cup sits close to heavy cream's density, which makes sense given both are cultured dairy products with meaningful fat content — sour cream is essentially cream that's been fermented with lactic acid bacteria, giving it its characteristic tang and thick, spoonable texture.
That thick texture is a stabilized emulsion — fat, water, and protein held together in a specific structure that's genuinely fragile to disruption. This is exactly why sour cream doesn't freeze well: ice crystal formation physically breaks that emulsion apart, and it doesn't reassemble on thawing, leaving a grainy, watery texture that's fine stirred into a cooked sauce but unusable as a dollop on tacos or a baked potato.
Full-fat sour cream and reduced-fat or light sour cream aren't identical in this conversion — lower-fat versions typically contain more water and stabilizers to maintain a similar texture with less fat, which can shift the weight-per-cup figure slightly; this site's 230g figure reflects standard full-fat sour cream.
Sour cream's 230g-per-cup weight is close to milk's, which makes sense given it starts as cream cultured with lactic acid bacteria — the culturing process thickens its texture dramatically without changing its underlying density much, which is why sour cream can often substitute for plain yogurt by volume in a recipe with only a modest tang and richness difference to account for.
Full-fat sour cream holds up better to the heat of a simmering sauce than reduced-fat versions, which are more prone to breaking (curdling) when added directly to a hot pan — a real textural risk worth knowing about before substituting a lighter product into a cooked application.
Stirring a spoonful of the hot liquid into the sour cream first, before adding it back to the pot, helps temper it and reduces the risk of curdling.
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Frequently asked questions
Why doesn't sour cream freeze well when other dairy does?
Sour cream's smooth, thick texture depends on a stabilized fat-water-protein emulsion that ice crystals physically break apart during freezing — unlike butter (mostly fat, little water) or hard cheese, which have much less water content to form disruptive ice crystals in the first place.
Is light or reduced-fat sour cream the same weight per cup as regular?
Not necessarily identical — a reduced-fat tub commonly has water and stabilizing gums worked in to keep a similar mouthfeel with less butterfat, and that formulation change can nudge the weight-per-cup figure off slightly from the full-fat version this site's conversion is built around.
Can I substitute Greek yogurt using this same cup-weight figure?
Greek yogurt has its own density figure (245g/cup) — close to sour cream's but not identical, and it's a legitimate substitute for sour cream in many recipes, covered on this ingredient's substitutes page.
Does draining sour cream through a cheesecloth change this conversion?
Yes — straining removes whey and concentrates the remaining solids, producing something closer to a thick yogurt-cheese than standard sour cream, with a meaningfully higher weight per cup than the 230g figure here.
Does sour cream sold for baking versus for topping differ in this conversion?
No — it's the same product regardless of how a store markets or shelves it; any weight difference would come from a genuine formulation difference (like reduced-fat), not from the intended use printed on the label.