Chunky Monkey Oatmeal Cookie Skillet (Printer-friendly)

Warm banana chocolate walnut oatmeal skillet baked to golden perfection in a cast-iron pan. Perfect for sharing with ice cream.

# Required Ingredients:

→ Dry Ingredients

01 - 1½ cups old-fashioned rolled oats
02 - 1 cup all-purpose flour
03 - ½ teaspoon baking soda
04 - ½ teaspoon baking powder
05 - ¼ teaspoon salt

→ Wet Ingredients

06 - ½ cup unsalted butter, melted
07 - ⅓ cup light brown sugar, packed
08 - ⅓ cup granulated sugar
09 - 1 large egg
10 - 1 teaspoon pure vanilla extract

→ Chunky Monkey Add-ins

11 - 2 ripe bananas, mashed (approximately 1 cup)
12 - ½ cup semisweet chocolate chips
13 - ½ cup chopped walnuts
14 - ½ cup chopped dark chocolate (optional)

# How-To Steps:

01 - Preheat oven to 350°F. Grease a 10-inch cast-iron skillet with butter or nonstick spray.
02 - In a medium bowl, whisk together oats, flour, baking soda, baking powder, and salt. Set aside.
03 - In a large bowl, combine melted butter, brown sugar, and granulated sugar. Mix until well combined and creamy.
04 - Beat in egg and vanilla extract, then stir in mashed bananas until fully incorporated.
05 - Gradually fold dry ingredients into wet mixture until just combined. Do not overmix.
06 - Gently fold in chocolate chips, walnuts, and chopped dark chocolate if using.
07 - Spread batter evenly into prepared skillet.
08 - Bake for 22-25 minutes until edges are golden and a toothpick inserted in center comes out mostly clean with a few moist crumbs.
09 - Cool for 10 minutes before serving. Serve warm directly from skillet, optionally topped with vanilla ice cream.

# Expert Suggestions:

01 -
  • It's impressive enough to serve to guests but so easy you could make it on a weeknight without thinking twice.
  • The cast-iron skillet does all the work—no cooling racks, no plating fuss, just warm, shareable goodness.
  • That soft-chewy texture with pockets of chocolate and crunch from walnuts keeps you coming back for just one more bite.
02 -
  • Don't skip the cooling time—I learned this the hard way when I tried to serve it immediately and it fell apart like cornbread, though it tasted amazing scattered across the plate.
  • The difference between mushy and perfect is about three minutes in the oven, so set a timer and don't trust your eyes alone.
03 -
  • Brown your butter in a separate pan if you want next-level flavor—it only takes five minutes and that nutty depth makes people ask what your secret ingredient is.
  • Chill your mashed bananas in the fridge for ten minutes before folding them in if your kitchen is warm, so they don't accidentally cook the eggs in the batter.
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