Step 1

Preheat the oven to 350°F (175°C). Line two baking sheets with parchment paper.

Step 2

In a large mixing bowl, whisk the peanut butter, eggs, and vegetable oil until smooth.

Step 3

Gently stir in the cake mix until a thick dough forms. Be careful not to overmix.

Step 4

If using, add the granulated sugar to a small bowl. Portion the dough into 2 tablespoon-sized balls and toss in the sugar until evenly coated.

Step 5

Arrange the sugar-coated dough balls on the prepared baking sheets, ensuring at least 2 inches of space between each to allow for spreading.

Step 6

Use a fork to gently press down on each ball in a criss-cross pattern, slightly flattening them to create the classic peanut butter cookie design.

Step 7

Bake in the preheated oven for 9-11 minutes or until the edges are lightly golden.

Step 8

Remove the cookies from the oven and let them cool on the baking sheets for 2–3 minutes. Then, transfer them to a wire rack to cool completely before serving. Enjoy!