Heat oven to 350°F. Place paper baking cup in each of 18 regular-size muffin cups.
Step
2
In large bowl, mix flour, cocoa, brown sugar, baking soda and salt. Add oil, water, vinegar and vanilla to flour mixture, stirring just until smooth (do not overmix).
Step
3
In another large bowl, beat egg, cream cheese, peanut butter and granulated sugar with electric mixer on medium speed until smooth. Add powdered sugar; beat until creamy.
Step
4
Spoon 1 level tablespoon chocolate batter into each cup; evenly spread 1 level tablespoon peanut butter filling on top. Repeat layers. Sprinkle with peanut butter chips and chocolate chips.
Step
5
Bake 25 to 30 minutes or until toothpick inserted in center comes out clean (do not overbake). Cool in pan 15 minutes. Remove from pan to cooling rack; cool 15 minutes. Serve warm or cool.
