1Preheat oven to 350 degrees F. Grease muffin tin, set aside.
In a medium bowl, sift together flour, sugar, confectioner's sugar, and baking powder.
In a separate bowl, whisk together egg, milk, butter, vanilla. Add mixture to dry ingredients.
Fold batter until well incorporated and light.
Pour muffin tins half way. Place about 1/2 teaspoon of jam in center of batter and fill the rest of muffin tin.
Bake for about 20 minutes or until tester comes out clean.
Let cool for a several minutes before rolling each doughnut in sugar and transferring to a lined cooling rack
Serve and Enjoy!