Chunky Monkey Oatmeal Skillet (Printable View)

Warm oatmeal skillet with bananas, chocolate chips, and walnuts baked until golden in a cast-iron pan.

# What You’ll Need:

→ Dry Ingredients

01 - 1 1/2 cups old-fashioned rolled oats
02 - 1 cup all-purpose flour
03 - 1/2 teaspoon baking soda
04 - 1/2 teaspoon salt
05 - 1/2 teaspoon ground cinnamon

→ Wet Ingredients

06 - 1/2 cup unsalted butter, melted and slightly cooled
07 - 1/2 cup light brown sugar, packed
08 - 1/4 cup granulated sugar
09 - 1 large egg
10 - 2 teaspoons vanilla extract
11 - 2 medium ripe bananas, mashed

→ Mix-ins

12 - 1/2 cup semisweet chocolate chips
13 - 1/2 cup chopped walnuts
14 - 1/4 cup unsweetened shredded coconut, optional

# How To Make It:

01 - Preheat oven to 350°F. Lightly grease a 10-inch cast-iron skillet with butter or nonstick spray.
02 - In a large bowl, whisk together oats, flour, baking soda, salt, and cinnamon.
03 - In a separate bowl, combine melted butter, brown sugar, and granulated sugar. Whisk until smooth.
04 - Add egg and vanilla extract to the wet mixture and whisk well. Stir in mashed bananas until fully combined.
05 - Pour wet mixture into dry ingredients and mix until just incorporated.
06 - Gently fold in chocolate chips, walnuts, and coconut if using.
07 - Spread dough evenly into the prepared skillet.
08 - Bake for 20 to 24 minutes until the top is golden and edges are set but center remains slightly soft.
09 - Cool for 10 minutes before serving warm. Serve slices directly from the skillet, optionally topped with ice cream.

# Best Practices:

01 -
  • It bakes in one pan and feeds a crowd without feeling fussy or precious about it.
  • The center stays soft while the edges crisp up, which means that perfect moment of warm and gooey every single time.
  • Bananas keep it naturally sweet, so you're not drowning in sugar but still get that dessert satisfaction.
02 -
  • Don't skip cooling time in the skillet—I learned this by trying to slice it too early and watching it crumble everywhere, which taught me patience tastes better.
  • Mashed bananas naturally have moisture, so if your bananas are extra watery, mash them and let them sit in a colander for a few minutes to drain—this prevents a soggy bottom.
03 -
  • Toast your walnuts in a dry skillet for three minutes before chopping if you have the time—it wakes up their flavor in a way that makes people ask what secret ingredient you used.
  • If your cast iron isn't well-seasoned, line it with parchment paper under the butter layer to prevent sticking without losing the beauty of baking in iron.
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