Name: Anna Olson's Halloween Nanaimo Bars
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Ingredients: ----For the crust----; ½ cup (115 g) unsalted butter, cut in pieces; ¼ cup (50 g) granulated sugar; ¼ cup (30 g) black cocoa powder (or regular); ½ tsp salt; 1 large egg, lightly beaten; 11/2 cups (195 g) graham cracker crumbs; 1 cup (100 g) crushed salted pretzels; ----For the filling----; ½ cup (115 g) unsalted butter, room temperature; 2 cups (260 g) icing sugar, sifted (divided); 2 Tbsp (12 g) vanilla custard powder; 2 tsp pumpkin pie spice; Pinch of fine salt; 3 Tbsp (45 mL) 1% or 2% milk; Orange food colouring; ----For the topping----; 4 oz (120 g) semisweet couverture/baking chocolate, chopped; 2 Tbsp (30 g) unsalted butter; 12 large marshmallows, for spiderwebs; Candy corn or other Halloween candy, for décor