Polish Czech Blueberry Buns Recipe

Ingredients

• 500 grams All-purpose flour
• 250 milliliters Milk
• 70 grams Granulated sugar
• 100 grams Unsalted butter
• 2 large Eggs
• 7 grams Active dry yeast
• 1 teaspoon Salt
• 300 grams Blueberries (fresh or frozen)
• 50 grams Powdered sugar
• 1 tablespoon Cornstarch
• 50 grams All-purpose flour (for streusel)
• 25 grams Granulated sugar (for streusel)
• 25 grams Unsalted butter (for streusel)
• 1 tablespoon Milk (for egg wash)
• 1 large Egg yolk (for egg wash)