1 cup sour cream, warmed 1/2 cup sugar 1 1/2 tsp salt 1/2 cup butter 2 eggs, beaten 4 cups flour
1/3 cup butter (melted) 1 cup sugar 2/3 cup flour
In a small bowl, dissolve yeast in warm water, and set aside.
Mix sour cream, sugar, salt and butter in a bowl. Add yeast mixture. Add beaten eggs, and flour. Mix with dough hook, or by hand. Place the dough in a greased bowl, covered, and refrigerate overnight. Dough should at least double.
Heat oven to 350F.
Roll dough into 1 1/2 or 2 inch balls and place on a cookie sheet, about an inch apart. Flatten dough with the heel of your hand and let rise another 10 minutes.
Make an indentation in each kolache with your thumb (I suggest making this a bit more exaggerated than a normal thumb print) and fill with your favorite filling. (Lemon, cherry and cream cheese are all popular, I chose apple)
Sprinkle with streusel topping, and bake at 350 for 15 - 20 minutes.