01 -
Start by tossing your softened butter, brown and white sugars, and a splash of vanilla into your stand mixer's bowl. Blend them on medium speed for 60 seconds. Next, crack both eggs into it and blend on low until it's all smooth. Toss in the flour, cocoa, cornstarch, baking soda, and salt, and mix everything until combined.
02 -
Put a sheet of parchment on your cookie tray. Scoop out dough balls (about 2 tablespoons each) and line them up with some space between. Pop the tray into the fridge to rest for 30 minutes, which will help the flavors develop and stop the cookies from spreading too much.
03 -
Warm your oven up to 350°F. If the dough has been chilling for longer than 45 minutes, leave it on the counter for 5 minutes before baking. Spread the chilled dough balls out on another parchment-lined tray, keeping them about 2 inches apart. Bake for around 9-10 minutes, just until the edges firm up.
04 -
Let the cookies cool right on the tray for 5 minutes. Then transfer them to a cooling rack so they can chill down completely.
05 -
Melt the white chocolate in your microwave in 20-second bursts, stirring each time till smooth. Let it sit till room temperature. Blend the softened butter, powdered sugar, and both peppermint and vanilla flavorings using a stand mixer or hand mixer. Stir in the cooled chocolate. Add heavy cream a spoonful at a time until it's smooth and spreadable.
06 -
Break the chocolate bars into chunks and place in a heat-resistant bowl. Pour cream into a small saucepan and warm over medium heat until just bubbling. Pour the hot cream onto the chocolate. Let it sit for 5 minutes, then stir with a whisk. Add the vanilla and peppermint flavor (if you want) and mix until shiny and smooth. Cool it for about 15-30 minutes until it's spreadable.
07 -
Once the cookies, buttercream, and ganache are all ready, spread 1-2 tablespoons of the buttercream on each cookie. Cover with the ganache, leaving a tiny bit of white around the edge. Sprinkle crushed peppermint candy on top. Enjoy right away!