Creating Brown Sugar Pop Tart Cookies is simple and enjoyable. Follow these steps to bake a batch of delectable cookies:

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C). Line a baking sheet with parchment paper for easy cleanup.

2. Mix Dry Ingredients: In a medium bowl, whisk together the flour, baking powder, baking soda, and salt until well combined.

3. Cream Butter and Sugars: In a large mixing bowl, cream the softened butter, brown sugar, and granulated sugar together using an electric mixer until it is light and fluffy.

4. Add Egg and Vanilla: Beat in the egg and vanilla extract into the butter mixture, mixing until smooth.

5. Combine Mixtures: Gradually add the dry flour mixture to the wet ingredients, stirring until just combined. Avoid overmixing to keep the cookies tender.

6. Form Cookies: Take a small portion of the dough (about 1 tablespoon) and flatten it into a round disc. Add a teaspoon of fruit jam in the center, then place another disc of dough on top. Seal the edges by pressing them together with your fingers or a fork.

7. Bake: Place the assembled cookies onto the prepared baking sheet. Brush each cookie with an egg wash for a golden finish and sprinkle with colorful sprinkles if desired. Bake in the preheated oven for 12-15 minutes or until the edges are lightly golden.

8. Cool: Remove the cookies from the oven and let them cool on a wire rack for at least 30 minutes before serving. This step ensures the filling sets and the cookies firm up.

These steps will guide you in creating these incredible Brown Sugar Pop Tart Cookies effortlessly.