Gather the ingredients - * Butter * Brown sugar * Egg * Vanilla extract * Flour * Malted milk powder * Baking soda * Whoppers candy * Chocolate chunks
Whisk together the butter and brown sugar in a large bowl.
Once combined, add the egg and vanilla. Whisk again until fully combined.
Next, add the flour, malted milk powder, and baking soda. Stir until no large lumps of flour remain.
Add the malted milk balls and chopped chocolate. Fold them into the cookie dough.
Cover the cookie dough and place it in the fridge to chill for 30 minutes. While the cookie dough chills, preheat the oven to 350 degrees F and line two large baking sheets with parchment paper.
When the dough has chilled, scoop 1.5 tablespoon sized portions onto the prepared baking sheets, making sure to place them at least 2" apart.
Bake for 13-15 minutes, or until the edges are golden brown. Allow the cookies to cool to room temperature before removing them from the pan.
Store any leftover cookies in an airtight container at room temperature for four days.