1. Melt the butter and let cool down a bit. Add both sugars and the melted butter to a large bowl and mix until very light and fluffy. Add the egg and vanilla extract and mix well. Combine the flour with baking powder, and salt and add to the bowl – mix until just combined. Add the M&M’s and fold in. When everything is mixed place the dough in the fridge for about 45 minutes.

2. Preheat the oven to 350°F (180°C). Line a baking sheet with baking parchment. Use a cookie scoop or two tablespoons and place dough portions with enough space in between on the baking sheet – bake for about 12-14 minutes until the edges of the cookies got just a tiny bit of color. Take out of the oven, press some more M&M’s into the cookies if not enough are peeking out, let cool down on the baking sheet for some time, then transfer to a wire rack and let cool down completely. Repeat with the remaining dough.