01 -
Combine warm milk, sugar, and instant yeast in a bowl; allow to stand for 5–10 minutes until foamy.
02 -
Incorporate melted butter, egg, salt, and flour into the yeast mixture. Mix until a cohesive dough forms, then knead by hand or with a mixer for 6 to 8 minutes until the dough is smooth and elastic. Cover and let rise in a warm place for 1 hour, or until doubled in size.
03 -
Heat a skillet over medium heat. Sauté ground beef and finely diced onion until fully browned. Season with salt, black pepper, and garlic powder. Remove from heat and let cool slightly.
04 -
Divide the dough into 12 equal balls. Flatten each ball into a disc. Place a spoonful of beef mixture and grated cheese in the center; add a spoonful of sour cream or mayonnaise if desired. Fold dough over filling and pinch edges to seal, shaping into smooth balls.
05 -
Place filled balls seam-side down on a parchment-lined baking sheet. Whisk together egg and milk to create an egg wash and brush each dough ball evenly.
06 -
Transfer to an oven preheated to 190°C. Bake for 15 to 18 minutes or until tops are golden brown.
07 -
Combine melted butter with garlic powder. Brush over warm baked bombs. Sprinkle with grated Parmesan cheese and chopped herbs for garnish.