Set oven to 350 degrees. Use a silicone liner on darker cookie sheets. You'll need different sized heart cookie cutters to make the smaller cut out in the middle. 

Whisk dry ingredients and set aside.

Cream butter and sugar until very pale and fluffy. Add the egg, and cream and then add the egg yolk and butter.

Add dry ingredients slowly, mixing as you add. Once blended, stop mixing

Scoop out of the mixer, form a ball, and cut the cookie dough in 3 parts, keeping the other 2 parts in the refrigerator.

Roll the dough into a rectangle and cut out heart shapes, using a smaller heart for the middle.

Bake about 12 minutes. Cool and sprinkle with powdered sugar.