Peanut Butter Marbled Brownies

I made these for my Sunday dessert craving and they were amazing!  My brother said they were the best brownies he's ever had!  So delicious!

Peanut Butter Marbled Brownies
6 oz. cream cheese, softened 
3/4 cup creamy peanut butter
1/4 cup sugar
1 egg
2 Tb milk
1 cup butter, melted
2 cups sugar
2 tsp vanilla extract
3 eggs
1 1/4 cups all-purpose flour
3/4 cup unsweetened cocoa powder
1/2 tsp baking powder
3/4 tsp salt
1 cup chocolate chips

Lightly grease 9×13 inch baking pan. Preheat oven to 350 degrees F.  In a medium bowl, beat together first 5 ingredients until smooth.  Set aside.
In a large bowl, mix together melted butter, 2 cups sugar, and vanilla.  Mix in eggs, one at a time. Combine flour, cocoa, baking powder, and salt; mix into the batter. Stir in chocolate chips.  Spread batter into prepared pan. Drop the peanut butter filling on top by the large spoonful.  Using a butter knife, gently swirl peanut butter filling through the chocolate batter to create a marbled effect. (The batter is stiff so this is a little difficult. The key is not to over swirl it.)  Once you are done swirling, you may need to tap the pan on a towel covered counter to make the batter settle.  Bake in preheated oven for 35-40 minutes or until a toothpick inserted one inch from the edge comes out clean.  Cool completely, then cut into small squares.

Recipe from: The Sister's Cafe