Preheat the oven to 350°F. Line two cookie sheets with parchment paper and set aside.
In a medium bowl, cream together the butter and sugar until light and fluffy. Add in the egg yolks, vanilla, lemon and orange extracts, and beat until fully combined.
In a separate bowl, mix together the flour, baking soda and cream of tartar.
Slowly add the dry ingredients to the wet ingredients, and mix until fully incorporated.
Using a medium cookie scoop (or using your hands), scoop the cookie dough onto the prepared cookie sheets.making sure they are at least 2 inches apart.
Bake in the preheated oven for 8-10 minutes, or until the edges begin to brown.
Remove from oven and allow to cool on the cookie sheets for 10 minutes, then transfer to wire racks to cool completely.