Creating Peanut Butter Sandwich Cookies is simple and rewarding. Follow these steps to ensure your cookies are perfect every time:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and prepare a baking sheet with parchment paper.
2. Combine Peanut Butter and Sugar: In a large mixing bowl, combine the peanut butter and granulated sugar. Stir until smooth.
3. Add the Egg: Crack the egg into the mixture and add the vanilla extract. Mix well until the ingredients are fully incorporated.
4. Scoop Cookies: Using a cookie scoop or tablespoon, drop the dough onto the prepared baking sheet, leaving space between them to allow for spreading.
5. Flatten Cookies: Gently press down on each cookie with a fork, creating a crisscross pattern.
6. Bake: Place the cookies in the preheated oven and bake for 10-12 minutes, or until the edges are golden brown.
7. Cool: Remove the cookies from the oven and let them cool on the baking sheet for about 5 minutes before transferring them to a wire rack to cool completely.
8. Prepare the Filling: Once the cookies are cool, spread frosting on the flat side of half the cookies, then sandwich with another cookie.
9. Enjoy: Your Peanut Butter Sandwich Cookies are ready! Enjoy them warm or store them for later.