Sift the flour, baking soda, salt, nutmeg and baking powder together.
In another bowl beat the Butter, sugar, egg, vanilla and sour cream
Mix the dry ingredients into the wet until combined
Divide into 4 flat disks, wrap in wax paper and refrigerate 4 hours or overnight.
Roll out the dough between parchment paper, thinner than normal, less than 1/4 of an inch
Cut out your circles and spread out the circles just a little bit, then roll them out as evenly as you can until they are about 1/8th of an inch (a little more is okay)
Dab a small amt of the jelly in the center of half the circles, then top each jelly circle with one of the plain circles.
Now cut the cookies one more time to seal the two layers together
sprinkle the vanilla sugar on the top to add a sweet crunch
Using a toothpick break through JUST the top layer into the jelly twice to create you teeth marks
bake 12-15 mins, until just slightly golden on the edges
let cool then add a little extra jelly "dripping" from the teeth marks