chocolate peanut butter bars

I saw the recipe for Peanut Butter Mud Bars on one of my favorite food blogs, Bake or Break, and I couldn't get the idea of eating these out of my head. Sometimes these things happen, and when I'm in the throws of a craving like this, I cannot be stopped. Even if I am missing some of the starring ingredients. I'm on a mission, and I need chocolate peanut butter bars, post haste. So, I just go for it, swapping and substituting till I try my new concoction, with fingers crossed. Sometimes things turn out great, like my cherished Peanut Butter Banana Chocolate Chip Cake (if you haven't made this yet, seriously just go and do it now—it's insane), and sometimes things do not turn out in my favor. Which is obviously not documented, and I try to erase The Mistake from my memory. This experiment turned out pretty good, not as epic as Pumpkin Bread Pudding, but I kept going back for seconds, so that's a pretty good sign, wouldn't you say?

Chocolate Peanut Butter Bars (heavily adapted from Peanut Butter Mud Bars via Bake or Break—recipe originally from The Buttercup Bake Shop Cookbook)

1 cup all-purpose flour
1/2 teaspoon baking soda
1/4 teaspoon salt
1/4 cup cocoa (I might even try more next time)
1/2 cup unsalted butter, softened
1 cup firmly packed light brown sugar
3/4 cup creamy peanut butter
1 large egg, at room temperature
1 teaspoon vanilla extract
1 cup chocolate chips (might try more of these, as well)

Frosting:
1/3 cup chocolate chips
1/3 cup peanut butter
2 tbs. sifted powdered sugar.

Preheat oven to 325°. Grease and lightly flour a 9″x 13″ baking pan.

Whisk together flour, baking soda, salt and cocoa. Set aside.

Using an electric mixer on low speed, beat butter and brown sugar until fluffy (about 2-3 minutes). Add peanut butter and beat well. Mix in egg and vanilla.

Gradually add dry ingredients and mix well. Stir in chocolate chips.

Spread mixture evenly into prepared pan. Bake 25-30 minutes, or until tester comes out clean.

While base is baking, combine the chocolate chips, peanut buter and powdered sugar in a small saucepan and cook on low until melted and evenly incorporated. Turn off heat once melted, but keep mixture on stove (the heat from the oven will keep the mixture warm).

Remove from oven, let cool for 20-30 minutes, then top with frosting. Let cool at least 30 minutes before eating.