Line a 13-in. x 9-in. x 2-in. baking pan with foil; grease the foil and set aside. In a mixing bowl, beat oil and sugar. Stir in vanilla. Add eggs, one at a time, beating well after each addition. Combine the flour, cocoa, baking powder and salt; gradually add to creamed mixture. Set aside 2 tablespoons peppermint candy for garnish; stir remaining candy into creamed mixture. Spread into prepared pan.
Bake at 350 degrees F for 35-40 minutes or until a toothpick inserted near the center comes out clean. Cool on a wire rack. For glaze, melt chocolate chips and shortening in a microwave or heavy saucepan; stir until smooth. Spread over brownies; sprinkle with reserved candy.