01 -
Set your oven to 350°F (175°C). Line an 8-inch cast-iron skillet with parchment paper, or grease the inside if not using parchment.
02 -
Mix the flour, salt, and baking powder in a small bowl. Give it all a good whisk, then set that aside.
03 -
In a big bowl, combine the melted butter with both sugars. Stir or mix until smooth. Toss in the vanilla extract and egg, mixing until the batter looks well-blended.
04 -
Add the dry mixture into the wet bowl. Stir gently—stop once all the flour is mixed in. Don't go overboard stirring!
05 -
Fold in ¾ cup of M&Ms. Make sure those candies are spread evenly throughout.
06 -
Press the dough out evenly into the prepared skillet using the back of a spoon or your hands.
07 -
Pop the skillet in the oven for 15–20 minutes. It's done when the edges look golden, but the center is still a bit soft.
08 -
Take the skillet out and let it cool down on a wire rack for around 10 minutes.
09 -
Use a microwave-safe bowl to heat the chocolate chips for 30 seconds. Stir really well. If needed, reheat in 15-second bursts, stirring each time, until totally smooth.
10 -
Spread the melted chocolate over the warm cookie evenly. Quickly press the leftover ¼ cup of M&Ms into the chocolate while it's still soft.
11 -
Let the cookie cool completely for another 15–20 minutes, or until the chocolate firms up.
12 -
Cut into pizza-style slices and serve. Use a sharp knife for clean slices, wiping between cuts as needed.