Step 1: Prepare your chosen cupcake batter (from a mix or scratch recipe) according to package or recipe directions.
Step 2: Line a 12-cup muffin tin with cupcake liners. Fill each liner about two-thirds full with batter.
Step 3: Bake according to the recipe or package instructions until a toothpick inserted into the center of a cupcake comes out clean. Let the cupcakes cool in the tin for a few minutes, then transfer them to a wire rack to cool completely.
Step 4: While cupcakes cool, prepare your vanilla buttercream frosting. If desired, add a few drops of white food coloring to achieve a brighter white, mixing until evenly combined.
Step 5: Fit a piping bag with a flat or ribbon tip (such as Wilton #47 or #44) and fill it with the prepared buttercream frosting.
Step 6: Once the cupcakes are completely cool, pipe horizontal strips of frosting across the top of each cupcake, overlapping slightly to create a 'bandage' effect. Leave a small, unfilled gap in the middle-top portion of the cupcake for the eyes.
Step 7: Gently press two candy eyeballs into the small gap on each cupcake, positioning them to look like the mummy's eyes peeking through the bandages.
Step 8: For an extra touch, use a fine-tipped piping bag with melted chocolate or ganache to draw small stitches or scars on the frosting 'bandages' if desired. Serve immediately or store in an airtight container.