Making the Easy Brownie Base:
Preheat & Prep: Get your oven ready at 350°F (175°C). Line an 8x8 inch square pan with parchment paper, leaving some overhang for easy lifting later.Mix Wet Ingredients: In a big bowl, whisk together the melted butter, vegetable oil, and granulated sugar until well combined. Then, stir in the eggs and vanilla extract until no egg pieces are visible.
Add Dry Ingredients: Gently fold in the sifted cocoa powder, flour, and salt. Mix just until you don't see any dry streaks or lumps. Sifting the cocoa helps a lot!
Bake: Pour the brownie batter into your prepared pan and bake for 20-25 minutes. A toothpick inserted into the center should come out with a few moist crumbs, not wet batter. Let the brownies cool completely in the pan – this is key for clean layers!
Whipping Up the Peppermint Filling:
Soften Butter: In another bowl, beat the softened butter until it's light and fluffy.Create Frosting: Gradually add 1 cup of powdered sugar, 1 teaspoon of peppermint extract, and a tiny drop of optional red food coloring. Mix on low speed, then beat in the remaining powdered sugar (about 1/2 cup at a time) until it reaches your desired sweetness and thickness. You can add a little more peppermint extract if you like a stronger minty taste.
Smooth It Out: Mix in the whipping cream, 1 tablespoon at a time, until the filling is smooth and spreadable. Remember, more powdered sugar means a thicker, sweeter filling!
Frost & Chill: Once the brownies are completely cool, spread the peppermint filling evenly over them with a flat knife. Pop the pan into the fridge while you prepare the ganache.
Crafting the Chocolate Ganache Topping:
Chop Chocolate: Finely chop your chocolate and place it in a heatproof bowl.Heat Cream: Gently heat the whipping cream until it's almost boiling. You can do this in the microwave (short bursts) or on the stove in a double boiler.
Combine: Pour the hot cream over the chopped chocolate. Let it sit for 2-4 minutes to melt the chocolate, then whisk until it's wonderfully smooth and glossy. If needed, gently heat for a few more seconds and whisk again until fully melted.
Top & Chill: Pour the smooth ganache over the chilled peppermint layer, spreading it evenly. Return the pan to the fridge to allow the ganache to set and harden.
Garnish & Serve: Just before serving, sprinkle the top generously with the crushed candy canes. Once firm, lift the entire brownie slab out of the pan using the parchment paper overhang. Place on a cutting board, peel back the paper, and slice into 16 uniform squares with a sharp knife, wiping the knife clean after each cut for beautiful presentation.