Savory Beef and Cabbage Rolls with Fluffy Dough - cookrisp

Ingredients

• 16 frozen unbaked rolls
• 1 pound lean ground beef
• 2 tablespoons unsalted butter
• 1 small yellow onion, finely chopped
• 2 cups finely chopped cabbage
• Salt, to taste
• Freshly ground black pepper, to taste
• 1 to 2 tablespoons all-purpose flour
• 1 egg
• 1 tablespoon milk