Decadent chocolate brownie slices with perfectly crinkly tops, designed to be decorated for Halloween. The recipe for the brownie slices is provided, while the buttercream frosting used for decorating is mentioned as being from a cookbook.
1. Preheat oven to 325 °F.
2. Add the sugars and eggs to the bowl of stand mixer fitted with the paddle attachment; cream on high speed until light and fluffy.
3. Meanwhile, melt the butter by microwaving in heatproof bowl/container at 30 second increments, stirring between each, then add the chocolate and stir until its fully melted and combined with butter.
4. Turn down the speed of mixer to lowest and add butter/chocolate mixture, oil, and vanilla.
5. Sift together flour, cocoa, cornstarch, salt, and add to wet ingredients while the mixer is still on low speed. Mix just until combined.
6. Fold the 1/2 cup of chocolate with silicone spatula.
7. Grease the 10 inch round silicone mold or spring form with nonstick spray, pour in the brownie batter and bake on middle rack for 35-45 minutes (until inserted toothpick comes out mostly clean)
8. Cool to room temperature before removing from the mold/ form, cut into 8 slices and decorate as desired 🍫
