Preheat oven to 325 degrees F.

Cover a cookie sheet with parchment paper

Using a stand mixer with a paddle attachment, cream butter and sugar together. Mix for 2 minutes.

Add in vanilla and salt, and butter flavoring (if using) scrape down sides of bowl.

Add in flour, mix until just combined.

Use a tablespoon measurer to scoop out a heaping TBS ball of dough, and place it on the parchment sheet. Then depress the center either with a smaller measuring spoon or your thumb.

Fill the center with jam of choice

Bake 12-15 minutes until golden brown and puffy.

Remove from pan and let cool on wire rack.

Dust with confectioner's sugar once cooled.

Keep in airtight container until ready to eat. Good for 3 days.