2 cups chocolate graham cracker crumbs (about 10 whole crackers)
1 package (10 ounces) miniature marshmallows
In a large microwave-safe bowl, combine chocolate chips, butter and peanut butter. Cover and microwave on high for 1-1/2 minutes; stir until well blended. Stir in vanilla. Add cracker crumbs and marshmallows; stir until coated. Spread into a greased 13-in. x 9-in. pan. Cover and refrigerate for 1 hour or until firm. Cut into bars.