
½ cup butter, softened
1 cup sugar
2 eggs
1 teaspoon vanilla extract
1 cup all-purpose flour
½ cup unsweetened cocoa powder
1½ teaspoons baking powder
¼ teaspoon salt
1 (12-ounce) package semisweet chocolate chips (2 cups)
1 (11-ounce) package caramel bits
6 (1.4-ounce) milk chocolate English toffee bars, coarsely chopped