Ingredients

1 1/2 cups all-purpose flour 

3/4 cup unsweetened Dutch-process cocoa powder 

1 1/2 cups sugar 

1 1/2 teaspoons baking soda 

3/4 teaspoon baking powder 

3/4 teaspoon salt 

2 large eggs 

3/4 cup warm water 

3/4 cup buttermilk 

3 tablespoons vegetable oil, such as safflower 

1 tablespoon pure vanilla extract 

Preparation

Preheat oven to 350 degrees. Line 2 standard muffin tins with paper liners. Whisk together flour, cocoa powder, sugar, baking soda, baking powder, and salt in a medium bowl.

Mix in eggs, water, buttermilk, oil, and vanilla until smooth, about 3 minutes. Divide batter evenly among prepared muffin tins. Bake, rotating tins halfway through, until tops spring back when lightly touched, about 20 minutes. Let cool in tins on wire racks.