Creating Mummy Brownies is both fun and rewarding, especially when you follow these easy steps:

1. Preheat Your Oven: Set your oven to 350°F (175°C) and grease a 9×13 inch baking pan.
2. Mix Wet Ingredients: In a large bowl, combine melted butter and sugar. Mix well until smooth. Add the eggs and vanilla extract, stirring until fully blended.
3. Combine Dry Ingredients: In another bowl, sift together the flour, cocoa powder, salt, and baking powder.
4. Combine Mixtures: Gradually add the dry mixture to the wet ingredients, stirring until just incorporated. Do not over-mix!
5. Pour Batter: Transfer the brownie batter to the greased baking pan and spread evenly.
6. Bake: Place the pan in your preheated oven and bake for 25-30 minutes. Use a toothpick to check; it should come out clean or with a few moist crumbs.
7. Cool and Decorate: Remove the brownies from the oven and let them cool for about 10-15 minutes. Once cool, cut them into rectangles or squares. Use the white icing to create bandage designs on each brownie. Attach candy eyes to finish the spooky look!

These straightforward steps will lead you to make wonderfully spooky Mummy Brownies, ready to share and enjoy!