Step 1

Heat oven to 350°F. Grease a 9 x 13 pan with cooking spray. Set aside.

Step 2

Place butter in medium saucepan on the stove. Heat over medium heat until butter is melted. Remove from heat and stir in sugar and vanilla extract. Add eggs, one at a time, beating well with spoon after each addition. Add cocoa; stir until well blended. Add flour, baking powder and salt; stir until combined. Stir in Twix candy bar chunks. Pour batter into prepared pan.

Step 3

Drizzle caramel evenly over the brownies. Using a toothpick, swirl caramel into brownies. Bake for 35-40 minutes or until brownies begin to pull away from sides of pan and a toothpick inserted in the middle comes out clean. Cool brownies completely in pan on a wire rack. Once cool, cut into squares and serve.