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| unsweetened cocoa powder (sifted): 3/4 cup |
| all-purpose flour (unsifted): 3/4 cup |
| baking powder: 1/2 tsp |
| salt: 1/4 tsp |
| unsalted butter: 3/4 cup (room temperature) |
| granulated sugar: 1 cup |
| eggs: 3 (large) |
| vanilla extract: 1 tsp |
| sour cream: 1/2 cup |
Credit: Food.com