Preheat your oven to 180°C and line a prepared baking sheet with parchment paper.

In a large mixing bowl, combine the peanut butter and eggs and stir everything until the eggs are fully combined with the peanut butter.

Add the sugar and vanilla, and knead by hand just enough to combine everything.

Scoop tablespoon-sized balls of dough and roll each cookie dough ball between your hands.

Place them on the baking sheet, leaving a little space between each.

Use a fork to gently press down and create that classic crisscross pattern on your 4 ingredient peanut butter cookies.

Pop them in the oven and bake for 8-10 minutes, or until the edges are set but the centers still look slightly soft. They’ll firm up as they cool, so don’t overbake.

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