White Chocolate Peppermint Blondies with Frosting

Blondies
0 Preheat the oven to 350°F and line an 8×8-inch baking pan with parchment paper, leaving parchment overhangs on two opposite sides; set it aside.
1 Next, whisk together the flour, baking soda, cornstarch, and salt in a separate medium bowl. 
2 In a large bowl of an electric mixer or stand mixer, cream butter with the sugars at medium-high speed for 2-3 minutes. 
3 Add the eggs, peppermint extract, and vanilla, mixing until just combined.
4 Incorporate the flour mixture into the wet mixture, beating at low speed, mixing until just combined, and being careful not to overmix—your dough will be quite thick. Gently fold in the white chocolate chunks and chips, ensuring an even distribution throughout the dough.
5 Transfer the dough to the prepared pan, smoothing it with a rubber spatula to form an even layer. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out with moist crumbs attached, but no wet batter. Allow the blondies to cool in the pan for 10 minutes before transferring them—lift blondies using the parchment paper overhang—to a wire rack for complete cooling.
Frosting
8 Melt the white chocolate either on the stove using a double boiler or in the microwave (in 30-second intervals). Let it cool until it's pourable but not hot to the touch—check out these tips for melting chocolate properly.
9 Next, beat together the butter and cream cheese at medium speed for 1 minute, until creamy.
10 Slowly add in the sifted powdered sugar, vanilla extract, peppermint extract, and salt, mixing until everything is combined.
11 Then, add the cooled melted chocolate and mix until everything comes together smoothly. Add more peppermint extract if necessary, to taste.If the frosting seems too runny, pop it in the fridge for 5 to 10 minutes to let the chocolate set, then give it another beating until it reaches your preferred consistency.
12 Spread the frosting over your cooled blondies and sprinkle crushed peppermint candies on top. Cut them into squares or 16 equally-sized triangles, and dig in!