Chunky Monkey Oatmeal Cookie Skillet (Print)

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

# What You'll Need:

→ 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

# Directions:

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 rolled oats, flour, baking soda, baking powder, and salt. Reserve.
03 - In a large bowl, combine melted butter with brown sugar and granulated sugar. Mix until creamy and well incorporated.
04 - Beat egg and vanilla extract into the sugar mixture. Stir in mashed bananas until fully integrated.
05 - Gently fold dry ingredients into wet mixture until just combined. Avoid overmixing.
06 - Fold in chocolate chips, walnuts, and chopped dark chocolate if desired.
07 - Spread batter evenly into prepared cast-iron skillet.
08 - Bake for 22 to 25 minutes until edges are golden and toothpick inserted in center emerges mostly clean with slight moist crumbs.
09 - Cool for 10 minutes before serving. Present warm directly from skillet, optionally garnished with vanilla ice cream.

# Expert Advice:

01 -
  • It bakes in one skillet, which means fewer dishes and maximum coziness factor.
  • The banana keeps everything moist and tender without any fussiness or special techniques.
  • You get that oatmeal cookie texture with chocolate and nuts in every warm bite.
02 -
  • Do not overmix once the dry and wet ingredients meet, or your skillet cookie will be dense and regrettable instead of tender.
  • The bananas must be truly ripe and soft—underripe ones won't mash properly and will leave bitter pockets in the final product.
03 -
  • Mash your bananas the day before if you want to get ahead—they actually develop more flavor sitting overnight.
  • A skillet that's still warm from the oven creates that gorgeous golden crust at the edges, so don't use a cold one.
Go Back