Easter Nest Cake

INGREDIENTS

6 oz

butter (at room temperature)

4 3/4 oz

granulated sugar ((2/3 cup))

5 oz

brown sugar ((2/3 cup packed))

eggs (at room temperature)

2 tsp

vanilla extract

8 oz

buttermilk (1 cup, at room temperature)

4 oz

sour cream (1/2 cup, at room temperature)

2 tbsp

water or brewed coffee

7 4/5 oz

all-purpose flour ((1¾ cups))

3 oz

sifted unsweetened cocoa powder ((1 cup))

1 1/2 tsp

baking soda

1/2 tsp

salt

12 oz

unsweetened chocolate (finely chopped)

9 cups

powdered sugar ((36 oz))

12 oz

unsalted butter ((3 sticks, or 1 1/2 cups) at room temperature)

1/2 cup

milk (plus more if necessary)

1 tbsp

vanilla extract

1/4 tsp

salt

Assorted chocolate eggs (Peeps, or other Easter edibles, to decorate)