Preheat your oven to 325°F (165°C). Gather all ingredients and equipment.

Cream together the softened butter and granulated sugar in a stand mixer until light and fluffy, about 3-4 minutes. Add the egg and vanilla extract, mixing until well combined. Gradually incorporate flour and baking powder until the dough forms.

Roll the cookie dough into 1-inch balls and place them on a prepared baking sheet. Press your thumb gently into the center of each ball to create an indentation.

Spoon about 1/2 teaspoon of your chosen fruit jam into each indentation.

Bake for 18-20 minutes, rotating the baking sheet halfway through. Look for lightly golden edges.

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