Gooey Brownie Cake Bars are going to knock your socks off this Halloween. There are 5 luscious layers of yumminess. Your kids are going to love these fall themed brownies.
Prepare the brownie mix according to the package directions and set aside. In a separate bowl, prepare the Orange Funfetti cake mix as directed. Line a 9-by-13-inch baking pan with parchment; spray with cooking spray.
Spread the prepared brownie batter evenly across the bottom of the lined pan. Carefully spread the Orange Funfetti cake batter over the brownie layer, then bake in a preheated 325°F oven for 30–35 minutes.
Check that a toothpick inserted into the center comes out clean. Remove the pan from the oven and cool on a rack for 10 minutes, then spread marshmallow fluff over the still-warm cake layer.
Allow the cake to cool completely before spreading frosting over the marshmallow fluff layer. Scatter candy pieces evenly over the frosting, then refrigerate for one hour before cutting into squares and serving your layered treats.