Set your oven to 350°F (175°C) and let it preheat while you prepare the dough.

Line a baking sheet with parchment paper to prevent sticking and ensure even baking.

In a large mixing bowl, cream together peanut butter, softened butter, brown sugar, and granulated sugar until smooth and fluffy.

Add in the egg and vanilla extract, then mix until fully combined.

In a separate bowl, whisk together flour, baking soda, and salt to distribute everything evenly.

Gradually add the dry ingredients to the wet mixture, stirring until a soft cookie dough forms.

If using mix-ins like chocolate chips or chopped peanuts, fold them in now.

Scoop about 1 tablespoon of dough and roll it into a ball.

Place the dough balls 2 inches apart on the baking sheet.

Use a fork to press a crisscross pattern onto each cookie, slightly flattening them.

Bake for 10–12 minutes, or until the edges turn light golden brown.

The centers will look slightly soft—this is perfect for a chewy texture!

Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack.

Once fully cooled, enjoy them with a glass of milk or a hot cup of coffee!