2. Combine cake mix, peanut butter, eggs and milk in large mixing bowl. Beat at low speed with electric mixer until blended. Stir in peanut butter pieces.
3. Drop dough by slightly rounded tablespoonfuls onto prepared baking sheets. Bake 7 to 9 minutes or until lightly browned. Cool 2 minutes on baking sheets. Remove to cooling racks. Cool completely. Store in airtight container.
Tip
You can use 1 cup peanut butter chips in place of peanut butter pieces.
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