Step 1: Preheat your oven to 350°F (175°C) to ensure even baking.
Step 2: In a medium bowl, whisk together the flour, malted milk powder, cocoa powder, baking powder, and salt. Set aside.
Step 3: In a large mixing bowl, cream together the unsalted butter and sugar until light and fluffy (about 3-4 minutes).
Step 4: Beat in the eggs one at a time, followed by the vanilla extract.
Step 5: Gradually add the dry ingredients to the butter mixture, alternating with the whole milk. Mix until just combined.
Step 6: Gently fold in the chopped Whoppers and semi-sweet chocolate chips until evenly distributed.
Step 7: Scoop rounded balls of dough onto the prepared cookie sheet, leaving space between each cookie. Bake for 10-12 minutes.
Step 8: Allow cookies to cool on the baking sheet for a few minutes before transferring them to a cooling rack. Garnish with additional chopped Whoppers while warm.