To prepare a super chocolate sundae cake bar recipe, first you need to prepare the ingredients. First, you'll need the following ingredients: 14 cup (60 ml) sugar, 1 tablespoon (2.5 g) cocoa powder, 1/2 teaspoon vanilla extract, and 1 teaspoon salt. If you don't have any of these ingredients on hand, skip this step. You can find them at your local grocery store, or you can buy them online. Mix the dry ingredients with the wet ingredients until they're just combined. Then stir in the chocolate chips until it's evenly coated. Pour the batter into the prepared pan and bake for 20 to 25 minutes or until the top is golden brown. Remove the pan from the oven and allow the cake to cool for 10 to 15 minutes before cutting into squares.