In a saucepan over low heat, melt the butter. Stir frequently as it foams and turns golden with a nutty aroma. When browned, pour into a heatproof bowl. Cool at room temperature for 15–20 minutes, then chill in the fridge for 15 minutes more.
1 cup (2 sticks) unsalted butter
Place the pumpkin purée in a strainer for 5–10 minutes to remove excess liquid.
⅔ cup pumpkin purée
In a medium bowl, whisk together flour, pumpkin spice, baking soda, and salt. Set aside.
1 ⅔ cups all-purpose flour, 2 ½ teaspoons pumpkin spice, 1 teaspoon baking soda, ½ teaspoon salt
In a large bowl, whisk the cooled browned butter with both sugars until smooth. Add egg yolks, vanilla, and drained pumpkin purée. Mix until fully combined.
½ cup light brown sugar, 2 large egg yolks, 2 teaspoons vanilla extract, ½ cup sugar
Stir in the dry ingredients until just incorporated, then gently fold in chocolate chips.
1 cup chocolate chips
Cover and refrigerate for 30–60 minutes while preheating the oven.
Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper.
Using a medium scoop (about 2 tablespoons), portion dough into balls. Place 3 inches apart on the prepared sheet. Press in extra chocolate chips on top if desired.
Bake for 9–11 minutes, until the edges are lightly golden and set. The centers will look slightly soft. While hot, use a round cookie cutter to gently nudge cookies into a perfect circle.
Let cool on the sheet for 10 minutes, then transfer to a wire rack. Enjoy!