Melt butter in the microwave.
1 cup unsalted butter
In a medium-sized bowl, add the egg, vanilla, and melted butter. Beat with a hand mixer or whisk together.
1 large egg, 2 drops vanilla extract, 1 cup unsalted butter
To the bowl add sour cream.
1 cup sour cream
In a separate shallow plate, add baking soda and squeeze juice from the lemon. It will foam. Mix together and add to the rest of the ingredients.
1 tsp baking soda, ½ lemon
Fold in flour. (I use Canadian flour)
2½ cups flour,
Mix it until the dough forms into a ball.
Preheat the oven to 350F.
Cut the dough into four equal parts.
Roll out each piece into a circle. (Sprinkle some flour onto your counter to make it easier)
½ cup flour,
With a pizza slicer, cut the dough into pizza slice shapes.
Put a teaspoon of preferred jam on each slice and roll it in so the jam stays inside and the tip is showing, like a croissant.
jam,
Place on a baking sheet. Then you can either bake the way it is or brush the rogalik with 1 whisked egg and sprinkle on some sugar before placing it into the preheated oven.
1 large egg
Bake for 30-35 minutes, or until golden.
Let cool. Sprinkle with powdered sugar. (optional)