Pogatchke/Pogacsa, Butter

Ingredients

• 1 pound butter
• 2 pounds flour
• Little salt
• 3/4 cup sugar
• 3 eggs
• 1 tbsp. baking soda
• 1 tsp. baking powder
• 1 tsp. yeast, dissolved in 1/4 cup warm milk
• Egg yolk, for brushing