Chunky Monkey Oatmeal Cookie Skillet (Print)

Warm oatmeal skillet with bananas, chocolate chips, and walnuts baked to golden perfection.

# 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 (approximately 1 cup)

→ Mix-ins

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

# Directions:

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

# Expert Advice:

01 -
  • It tastes indulgent and shareable but comes together in under 40 minutes with zero fussy technique.
  • One skillet means one pan to clean, and the presentation looks way more impressive than the effort it actually takes.
  • Ripe bananas do the heavy lifting flavor-wise, so the chocolate and walnuts feel like luxurious additions rather than necessities.
02 -
  • Don't use perfectly yellow bananas; wait until they have brown speckles because overripe bananas are significantly sweeter and mash into a smoother texture that binds better.
  • If your oven runs hot, start checking at 18 minutes because ovens vary wildly, and a few minutes too long turns soft and chewy into dry and dense.
03 -
  • Mash your bananas on a cutting board with a fork rather than in a bowl so you can see exactly how smooth they are and ensure no large chunks remain.
  • If your chocolate chips or walnuts are cold from the fridge, they stay in better defined pockets rather than melting into everything, which some people prefer.
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