Since I don't have any cream cheese in the house, and all of the recipes I could find for swirled brownies called for cream cheese...
Your favorite brownie recipe (for 9x13) pan (I used the "On the Fence Brownies" from The King Arthur Flour Cookie Companion)
1/3 cup peanut butter
Put peanut butter in a small mixing bowl. Mix together all the ingredients for the brownies except the chocolate. Remove about 1/4-1/3 of the batter and put in bowl with peanut butter. Add chocolate to remaining batter (reduce amount of chocolate by about 1/4). Pour chocolate batter in prepared pan. Stir together peanut butter and batter. Dollop peanut batter on top of chocolate batter. Swirl lightly together. Bake according to brownie recipe directions.
It's still baking, I'll let you know how it turns out. Also, pictures to follow...
