A soft and chewy oatmeal chocolate chip cookie baked to perfection in a small cast iron skillet. This mini skillet cookie delivers a delightful combination of hearty oats, melty chocolate, and warm spices.
Heat your oven to 350°F (177°C). Generously butter a 6.5-inch cast iron skillet or a 5x5-inch baking dish and set it aside.
In a medium-sized bowl, mix together the melted butter, brown sugar, and granulated sugar until well combined. Add the egg yolk and vanilla extract, and beat until smooth.
In a separate small bowl, whisk together the flour, oats, baking soda, and ground cinnamon. Gradually add the dry mixture to the wet ingredients, mixing until just combined. Gently fold in the chocolate chips.
Press the cookie dough evenly into the prepared skillet. Bake for 15-18 minutes, or until the top is just lightly golden. Avoid overbaking, as the cookie will continue to cook in the hot skillet after it’s removed from the oven.
Let the cookie cool in the skillet for at least 10 minutes before slicing and serving. This allows the cookie to set and makes it easier to cut.
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Notes
Generously Butter the Skillet: Coating your skillet with plenty of butter ensures crispy, golden edges on your oatmeal chocolate chip skillet cookie. Don't hold back—it makes a big difference!
Measure Flour Correctly: Over-measuring flour can lead to a dry, dense cookie. To avoid this, spoon the flour into your dry measuring cup and level it off with a straight-edged utensil. Never scoop directly from the container, as it compacts the flour and alters the recipe balance.
Watch the Baking Time: Keep an eye on the cookie as it bakes. The top should be just barely golden, which typically takes 15-18 minutes. Cast iron retains heat, so the cookie will continue to cook after you remove it from the oven.
Let It Cool: Allow the cookie to rest in the skillet for at least 10 minutes before cutting. This cooling time helps the center set, giving you that perfect chewy texture in every bite.