Preheat oven to 350F. In a medium bowl stir together flour, baking powder, baking soda, and salt. Set aside.

In a large bowl, beat butter with electric mixer on medium to high speed for 30 seconds. Add granulated sugar, brown sugar, and vanilla; beat until combined, scraping down sides of bowl occasionally. Add eggs one at a time, beating well after each addition. Alternately add flour mixture and milk to butter mixture, beating on low speed after each addition until just combined.

Spoon batter into standard muffin cups, filling each about two-thirds full. Use the back of a spoon to smooth batter. Bake for 15-18 minutes or until a toothpick inserted in centers comes out clean. Cool cupcakes in muffin cups on wire racks for 5 minutes. Remove cupcakes from muffin cups and cool completely.

Spoon jelly, lemon curd, and/or cream filling into pastry bag(s) fitted with small round tip(s). Insert tip into the top of each cupcake and squeeze the jelly into cupcake until some is visible on the top. Sift powdered sugar over cupcakes. ENJOY!