INGREDIENTS
1/4 cup
. buttermilk
2 tbsp
. Dutch-processed cocoa
3 tbsp
. unsalted butter (, melted)
1 1/4 cups
. granulated sugar
1/4 cup
. vegetable oil
1
large egg
1
large egg yolk
1 tsp
vanilla extract
1 cup
. all-purpose flour
1/2 tsp
. salt
2 tsp
. red food color
1/2 cup
. semisweet chocolate chunks (, chips, or disks (optional))