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Preheat oven to 350°F. Line two large baking sheets with silicone baking mats or parchment paper.

In a medium saucepan, melt the unsalted butter over medium heat.

Add the packed light brown sugar to the melted butter. Stir continuously until the sugar is fully dissolved and combined with the butter, forming a thick, dark, caramel-like sauce. This should take about 3-5 minutes.

Remove the saucepan from the heat. Stir in the rolled oats and all-purpose flour until well combined with the sugar mixture.

Add the large egg and vanilla extract to the mixture. Stir thoroughly until all ingredients are fully incorporated and form a cohesive, gooey dough.

Drop small, spoonful-sized portions (about 1 teaspoon each) of the dough onto the prepared baking sheets, leaving plenty of space (about 3-4 inches) between each cookie as they will spread significantly.

Bake for 8-10 minutes, or until the cookies are golden brown, thin, and lacy. The edges should be crispy and the centers slightly chewy.

Immediately upon removing the baking sheets from the oven, use a small round cookie cutter (about 1 1/2 to 2 inches in diameter) to gently perfect the circular shape of the warm cookies. This step is optional but helps create uniform cookies.

Allow the cookies to cool on the baking sheets for a few minutes before carefully transferring them to a wire rack to cool completely. They will crisp up as they cool.


Preheat oven to 350°F. Line two large baking sheets with silicone baking mats or parchment paper.

In a medium saucepan, melt the unsalted butter over medium heat.

Add the packed light brown sugar to the melted butter. Stir continuously until the sugar is fully dissolved and combined with the butter, forming a thick, dark, caramel-like sauce. This should take about 3-5 minutes.

Remove the saucepan from the heat. Stir in the rolled oats and all-purpose flour until well combined with the sugar mixture.

Add the large egg and vanilla extract to the mixture. Stir thoroughly until all ingredients are fully incorporated and form a cohesive, gooey dough.

Drop small, spoonful-sized portions (about 1 teaspoon each) of the dough onto the prepared baking sheets, leaving plenty of space (about 3-4 inches) between each cookie as they will spread significantly.

Bake for 8-10 minutes, or until the cookies are golden brown, thin, and lacy. The edges should be crispy and the centers slightly chewy.

Immediately upon removing the baking sheets from the oven, use a small round cookie cutter (about 1 1/2 to 2 inches in diameter) to gently perfect the circular shape of the warm cookies. This step is optional but helps create uniform cookies.

Allow the cookies to cool on the baking sheets for a few minutes before carefully transferring them to a wire rack to cool completely. They will crisp up as they cool.
