Prepare the Dough: Combine sourdough discard, all-purpose flour, granulated sugar, active yeast, milk, egg, and salt in a large mixing bowl. Mix until a soft dough forms, then knead gently on a floured surface for about 5 minutes until smooth and elastic. Place it in a greased bowl, cover with a kitchen towel, and let it rise in a warm spot for about 1 hour, or until it doubles in size.

Make the Cinnamon Sugar Mixture: While the dough rises, mix together the cinnamon and brown sugar in a small bowl. Stir until evenly combined, and set aside.

Shape the Twists: Once the dough has risen, preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper. Roll the dough out into a rectangle about ½ inch thick on a floured surface. Brush a layer of melted butter over the dough, then sprinkle the cinnamon sugar mixture evenly across the surface.

Create Twists: Using a sharp knife or pizza cutter, slice the dough into equal strips, about 1 inch wide. Twist each strip gently and place them on the baking sheet, leaving space between for expansion.

Bake to Perfection: Transfer the baking sheet to the oven and bake for 15-20 minutes, or until golden brown and fragrant. Allow to cool slightly before transferring to a wire rack.

Serve & Enjoy: Enjoy the twists warm with coffee or tea, or store in an airtight container.