Chocolate Walnut Pound Cake

INGREDIENTS

Sifted cocoa, for preparing the pan

1 cup

butter at room temperature

1 1/3 cups

sugar

large eggs at room temperature

1 2/3 cups

all-purpose flour

1/3 cup

cocoa

1/2 tsp

baking soda

1/4 tsp

salt

1 cup

vanilla yogurt at room temperature

1 tsp

vanilla extract

2/3 cup

walnuts, coarsely chopped

6 oz

bittersweet chocolate, chopped