I got this recipe from a Czech church cookbook. It's the slightly sweet, yeast dough type. Kind of like a danish. I've heard of some people who use a cream cheese dough that is leavened with baking powder but this is the kind my friend's Bohemian grandma made. It's been awhile since I've made these, but I think I made them on 2 half sheets. Sometimes these are topped with a flour, butter, sugar mix called popsika. I don't like it so I just sift powdered sugar on top after they cool.
3 packs dry active yeast
1/2 Cup warm water
1 teaspoon sugar
2 & 3/4 Cups milk
2 sticks butter (use cold butter so it will cool your scalded milk faster)
3/4 Cups sugar
3 egg yolks
3 teaspoons salt
7 Cups AP flour
In liquid measuring cup, dissolve yeast in warm water. Sprinkle with 1 teaspoon sugar and let stand.
Scald milk in a sauce pan. Remove from heat and stir in butter and 3/4 cup sugar.
Cool to lukewarm. Add salt and egg yolks.
Combine milk mixture and yeast in a large bowl. Using a heavy mixer, add flour until all has been used.
Knead dough on a lightly floured board until glossy.
Place in a bowl, cover and let rise until doubled.
Shape egg sized pieces of dough into balls. Place 1 inch apart on greased sheet pans. Brush top of each ball with butter.
Let rise again until about double, they should be touching each other.
Make a deep indentation with your fingers into the dough ball and fill with 1 teaspoon of filling. This indentation must be deep -without penetrating the bottom - or you will have kolaches with topping instead of filling
Let rise 20 minutes.
Bake at 425 F for about 15 minutes.
Brush with melted butter immediately after removing to keep them soft.