Perfect for a crowd, rolled oats add a grainy texture to these peanutty bars topped with everyone's favourite - REESE’S PIECES Minis!
Heat oven to 350°F (180°C). Beat 3/4 cup (175 mL) butter, peanut butter and brown sugar until well blended. Add eggs and 1 tsp (5 mL) vanilla; beat thoroughly.
Stir together oats, flour, baking soda and salt; gradually add to butter mixture. (Dough will be thick.) Remove 2 cups (500 mL) dough; set aside. Press remaining dough onto bottom of 13x9x2-inch (33x23x5-cm) baking pan.
Prepare Chocolate Filling: melt remaining 1/2 cup (1 stick) (125 mL) butter or margarine in saucepan over low heat. Stir in cocoa and sugar. Add sweetened condensed milk; cook, stirring constantly, until smooth and thick. Remove from heat; stir in remaining 1-1/2 tsp (7 mL) vanilla extract. Spread filling evenly over dough. Crumble reserved dough evenly over filling. Sprinkle candy pieces evenly over filling.
Bake 25 minutes or until top is golden brown. (Chocolate will be soft.) Cool completely in pan on wire rack; cut into bars.