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| salted butter: 2 Tbl (softened) |
| granulated sugar: 3/4 cup |
| eggs: 1 |
| eggs: 1 (white) |
| buttermilk: 1/2 cup |
| buttermilk: 2 Tbl |
| water: 1/3 cup |
| distilled vinegar: 1 Tbl |
| vanilla extract: 1 tsp |
| all-purpose flour (unsifted): 1 1/2 cups |
| unsweetened cocoa powder (sifted): 1/4 cup |
| baking soda: 1 tsp |
| salt: 1/2 tsp |
| m&m's semisweet chocolate mini baking bits: 1/3 cup |
Credit: Food.com