Pre-heat your oven to 375°.
Cream the softened butter with a mixer. Add sugar gradually, and beat together.
Beat in the egg yolks. Then add the brandy and vanilla.
Add in the flour gradually, until fully incorporated. If it feels sticky, add more flour.
If you have whole almonds, add to a food processor, until they are finely chopped. It may help to add a little at a time.
Incorporate the almonds into the dough, and mix well.
Take the dough out, and knead into a ball.
To make each cookie uniform, use a 1/8 measuring cup and roll into balls. Place on a greased cookie sheet. The cookies will expand only a little bit in the oven.
Bake for 18 minutes, until they are a creamy color. Do not let them brown.
Let the cookies cool. Place on a dish that has been dusted with powdered sugar. Or you can use cupcake liners for each cookie. Then dust with additional powdered sugar on top. Enjoy!