This Giant One-Pan Skillet Cookie is a showstopper that brings joy to every bite. Packed with colorful M&Ms, it’s a feast for the eyes and a treat for the taste buds. The edges are perfectly crisp, while the center stays irresistibly gooey, creating a dreamy contrast of textures. In just 15 minutes of prep and 22 minutes of baking, you’ll have a warm, shareable dessert that’s as fun to make as it is to eat.
Every slice is a burst of rich chocolate and sweet, crunchy candy, making it impossible to resist. The skillet keeps the cookie warm, so every bite feels like it’s fresh from the oven. Whether it’s a cozy night in or a gathering with friends, this cookie is guaranteed to bring smiles. It’s simple, indulgent, and utterly unforgettable.
Ingredients for the Ultimate Giant One-Pan Skillet Cookie
- 2 ½ cups (10½ oz/355g) all-purpose flour
- 2 teaspoons baking powder
- 1 teaspoon baking soda
- ½ teaspoon salt
- 1 cup (8 oz/225g) butter (unsalted, softened)
- 1 cup (6 oz/170g) dark brown sugar (light brown sugar works too)
- ½ cup (4 oz/115g) granulated sugar
- 2 large eggs (room temperature)
- 2 teaspoons vanilla extract
- ¾ cup (4½ oz/130g) M&M’s (plus extra for topping, if desired)
Step-by-Step Instructions
- Preheat the oven to 350°F (180°C).
- In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
- Heat a 12-inch cast iron skillet over low heat. Add the butter and let it melt completely. Remove from heat.
- Stir in the dark brown sugar and granulated sugar with a wooden spoon until well combined.
- In a small bowl, whisk the eggs, then quickly add them to the skillet. Stir immediately to prevent the eggs from cooking.
- Mix in the vanilla extract until fully incorporated.
- Gradually add the dry ingredients to the skillet, stirring until just combined. Avoid overmixing.
- Gently fold in the M&M’s, reserving a few for topping if desired. Wipe down any flour on the sides of the skillet.
- Bake for 20 to 22 minutes, or until the edges are set but the center is still slightly soft. (Be careful not to overbake for that gooey center!)
- Let cool slightly, then serve warm with a scoop of vanilla ice cream for the ultimate treat!
Perfect Pairings: Toppings and Serving Ideas
This giant skillet cookie is a showstopper on its own, but adding a scoop of vanilla ice cream takes it to the next level. For extra indulgence, drizzle with caramel sauce or chocolate ganache. Want a fun twist? Serve with a side of whipped cream or a sprinkle of sea salt for a sweet-and-salty combo.
Storage and Reheating Tips
If you have leftovers (unlikely, but possible!), store the cookie in the skillet covered with foil or transfer slices to an airtight container. It stays fresh for up to 3 days at room temperature. To reheat, pop it in the oven at 300°F (150°C) for 5-10 minutes or microwave individual slices for 10-15 seconds to restore that gooey texture.
Customize Your Cookie: Recipe Variations
Swap out the M&M’s for chocolate chips, chopped nuts, or even pretzel pieces for a different flavor profile. Feeling adventurous? Add a handful of shredded coconut or dried fruit for a unique twist. You can also use peanut butter chips or white chocolate chunks to mix things up.
Cast Iron Care: Equipment Guidance
Using a 12-inch cast iron skillet is key for this recipe. Make sure it’s well-seasoned to prevent sticking. After baking, let the skillet cool completely before cleaning it with warm water and a soft sponge. Avoid soap to preserve the seasoning, and always dry it thoroughly to prevent rust.
Baking Like a Pro: Common Questions
Worried about overbaking? The cookie should look slightly underdone in the center when you take it out—it will continue to set as it cools. If your skillet isn’t oven-safe, transfer the dough to a greased 9×13-inch baking dish and adjust the baking time as needed. For a crispier edge, bake for an extra 2-3 minutes.
Giant One-Pan Skillet Cookie (With Loads of M&Ms!)
Ingredients
- 2 ½ cups all-purpose flour 10½oz/355g
- 2 teaspoons baking powder
- 1 teaspoon baking soda
- ½ teaspoon salt
- 1 cup butter 8oz/225g
- 1 cup dark brown sugar 6oz/170g
- ½ cup granulated sugar 4oz/115g
- 2 large eggs
- 2 teaspoons vanilla extract
- ¾ cup M&M’s 4½oz/130g
Instructions
- Preheat the oven to 350°F (180°C).
- In a bowl, whisk together the flour, baking powder, soda, and salt. Set aside.
- Heat a 12-inch cast iron skillet over low heat. Add the butter and let it melt completely. Remove from the heat and stir in the sugars with a wooden spoon.
- Whisk together the eggs in a bowl. Add it to the skillet and mix in right away with a spoon, quickly mixing so the eggs don’t cook from the heat. Stir in the vanilla extract.
- Stir in the dry ingredients until just combined. Lastly, fold in the M&M’s. Wipe down any flour that is left on the sides.
- Bake the cookie for 20 to 22 minutes, or until it’s mostly set in the center. (take care not to overbake or it will not be gooey in the middle. Serve warm from the oven with vanilla ice cream.
