Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a mixing bowl, cream together the softened butter and sugar until light and fluffy.

Add the egg and vanilla extract, and mix until well combined.

In another bowl, whisk together the flour and baking powder, then gradually add to the wet mixture.

Using a cookie scoop, drop dough onto the prepared baking sheets.

Make an indentation in the center of each cookie using your thumb or the back of a spoon.

Fill each indentation with your chosen fruit jam.

Bake in the preheated oven for 12-15 minutes, or until lightly golden around the edges.

Remove from the oven and let cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.