Peanut Butter Meltaway Cake

So, it has certainly been a while since I have posted a new recipe.  Life has been crazy busy, but the school year is nearly done and maybe, just maybe, life will slow down a little!
The recipe today is a favorite of my family...a recipe I got from a friend many years ago...and one I have made MANY times!
It does take a little while to do as there are some steps to do but it is worth EVERY minute spent preparing it!  If you are a chocolate/peanut butter lover, you will be happy!

Peanut Butter Meltaway Cake
Layer 1:
In a small saucepan:
1 c butter
1/4 c cocoa powder
2 eggs, beaten
1/2 c sour milk
Melt butter, add cocoa.  Mix together eggs and sour milk and add to melted butter/cocoa mixture.  Bring just to boiling. Stir well.   Remove from heat and immediately add 1 c cold water and 1 tsp vanilla.    Set aside.
Meanwhile, in a large mixing bowl:
2 c sugar
2 c flour
pinch salt
1 tsp baking soda
Mix together and add liquid.  Mix well, beating till smooth.  Pour into a 13X9 baking pan that has been lightly sprayed with non-stick spray.  Bake at 350* for 40 - 45 minutes.  Remove from oven and cool completely.
Layer 2:
Melt one cup peanut butter in the microwave for about one minute.  Pour and spread melted peanut butter over the cooled cake.  Refrigerate for 20 minutes.
Layer 3:
1/2 c butter
1/3 c cocoa
4 1/2 c powdered sugar
1 tsp vanilla
6 TBL sour milk
In large saucepan, melt butter over low heat.  Add cocoa and bring just to a boil.  Remove form heat.  Add remaining ingredients.  Beat with wire whisk till smooth.  Pour on cake.  Icing will be runny but will thicken and harden a bit as it cools.  Cool and store in  refrigerator.