Ingredients2 cups granulated sugar 2 3/4 cup all-purpose flour 1 cup unsweetened cocoa (sifted) 2 teaspoons baking soda 1/2 teaspoon baking powder 1/2 teaspoon salt 1 cup (2 sticks) unsalted butter, softened (do not soften in microwave) 1/4 cup vegetable oil 4 large eggs at room temperature 1 cup milk 1 teaspoon vanilla extractDirectionsPreheat oven to 350 degrees and grease a 15" rectangular pan with non-stick cooking spray. In a mixing bowl, add the dry ingredients: sugar, flour, cocoa, baking soda, baking powder, and salt. Whisk for 1 minute to blend. Then, add softened butter a few pieces at a time while the mixer is on low speed. Beat approximately 1 minute or until the dry ingredients are crumbly and moistened. Scrape the bottom and sides of the bowl. In a separate bowl, whisk the eggs, milk, oil and vanilla until blended. Slowly add approx. 1/2 of the egg mixture to the dry ingredients and beat for 1 1/2 minutes at medium speed. Scrape the bottom and sides of bowl. Then, add the remaining egg mixture, beating for 20 seconds. Scrape the sides and bottom of bowl. Pour into prepared pan and bake at 350 degrees for 35 to 40 minutes or until the center of the cake springs back to the touch and a toothpick comes out clean. Cool the cake for 10 minutes on a rack and then turn out of the pan.

Use chocolate frosting to cover the cake.

Remove cream from Oreo cookies and smash to make crumble. Add cookie crumble to the sides of the cake.

Mix vanilla icing with green food colouring. Use a piping bag and grass decorating tip to pipe on icing.

Melt dark chocolate and white chocolate in separate bowls. Add food colouring to the white chocolate to get an orange colour. Pour melted chocolates into separate pastry bags. Pipe a tree (using dark chocolate) and moon (using white chocolate) onto a baking sheet lined with parchment paper. Refrigerate until hard (4-6 minutes).

Mold Rice Crispy Treats into the shape of a tombstone. Add black food colouring to fondant and twist it to make a marble affect. Cover tombstone with fondant. Use black food colouring and a toothpick to add details.

Mold Rice Crispy Treats into the shapes of fingers. Cover fingers with white fondant. Use black food colouring and a toothpick to add details.

Add chocolate moon and tree to cake (use toothpicks, if necessary). Place tombstone and fingers on top of cake. Add cookie crumble to middle of cake.Add any additional details to the cake.