Almond Butter Sheet Cake

2 cups flour
2 cups sugar 
1 tsp. salt
1 tsp. baking powder
1 cup butter
1 cup milk
2 eggs
1/2 cup sour cream
1 tsp. almond extract
Frosting:
1/2 cup butter
1/4 cup milk
1/2-1 tsp. almond extract (if you love almond flavor, use the entire teaspoon)
3 cups powdered sugar
In a bowl, combine the flour, sugar, salt, and baking powder. Whisk together. In a medium sized sauce pan put the milk, and butter. Turn on medium heat and cook until melted. Bring to a low boil and then remove from heat. Pour the butter/milk mixture into the bowl with the flour and sugar. Whisk together and then add the eggs, sour cream and vanilla. Mix together the batter until combined and then pour into a jelly roll pan that has been sprayed with cooking spray. Bake at 350 for 22-23 minutes, or until the cake is cooked through. Remove from the oven and set aside. While the cake is baking make the frosting. In a bowl, add the butter, peanut butter and milk together. Beat with an electric mixer until smooth. Add the vanilla and powdered sugar and continue to beat until smooth and fluffy. Once the cake is out of the oven, spread the frosting on the hot cake. Serve the cake warm or cold. If you want to drizzle chocolate on top of the cake you could also do that.