Chocolate peanut butter cup cake ( new & updated)

This is my favorite cake recipe that I keep tweaking until I get it perfect. Rather than modifying the original post over and over again, I thought I'd just post an updated one.

Chocolate cake:
Recipe from: Hershey's 

Ingredients:
2 cups sugar
1-3/4 cups all-purpose flour
3/4 cup HERSHEY'S Cocoa
1-1/2 teaspoons baking powder
1-1/2 teaspoons baking soda
1 teaspoon salt
2 eggs
1 cup milk
1/2 cup vegetable oil
2 teaspoons vanilla extract
1 cup boiling water
Mix together the sugar, flour, cocoa powder, baking powder, baking soda, and salt. Beat in the eggs, milk, oil, and vanilla. Stir in the boiling water and pour into 2 prepared 9-inch cake pans. Bake at 350 degrees for 20-35 minutes.


Peanut butter filling:
recipe from: Allrecipes 

 Ingredients:
- 1/2 c. butter, softened
- 1 c. peanut butter
- 1 1/2- 2 c. icing sugar
- 3 tbsp. milk

Beat all the ingredients together and use it to ice in between the 2 chocolate cakes. 


Chocolate Ganache:
recipe from: Allrecipes 

Ingredients:
- 12 oz. chopped chocolate( that's 1 of those Hershey's chocolate chip bags)
- 1 2/3c. heavy cream

Place the chocolate in a bowl. In a saucepan, heat the heavy cream until it's brought just to a boil. Pour the hot cream over the chocolate and whisk until smooth. Refrigerate until thick and then use it to ice the outside of the layer cake.