400 grams of cornstarch to cups
400 grams of cornstarch is 3.54 cups — near enough 3 1/2 cups + 2 tsp.
The answer
3.54 cups
≈ 3 1/2 cups + 2 tsp
Worked out from 113 grams per US cup: 400 ÷ 113 = 3.54. Approximate — density shifts with packing and brand.
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≈
Based on g per cup. Approximate — density varies with packing and brand.