1 cup all-purpose flour
1 teaspoon baking soda
1/4 teaspoon salt
1/4 teaspoon ground black pepper
6 egg yolks
Pour flour into a large bowl and add baking soda, salt, pepper and egg yolks. Mix until smooth and just blended. Cover and refrigerate 12 hours.
Preheat oven to 350 degrees F (175 degrees C).
Lightly grease 12 baking cups or muffin tins.
Roll out 2 layers of muffin foil and place in oven. Private oven sealers allow baking cups to be placed on foil.
Bake in preheated oven for 15 minutes.