In a large bowl, combine the gluten free flour, baking powder, salt and 3 tbsp melted butter.

Add the ¼ cup sugar, 1 ¼ cup milk and 1 egg, combine until a dough forms.

Place the dough on a surface sprinkled with gluten free flour.

Roll the dough out into a rectangle.

Spread the butter onto the dough.

Combine the remaining sugar and cinnamon in a small bowl and sprinkle evenly across the dough. Roll the dough up.

Slice the dough every ½ inch.

Place the rolls in a cake pan or pie plate sprayed with cooking spray.

Bake 20-25 minutes.

While the cinnamon rolls are baking, whisk the remaining ¼ cup milk and 1 cup powdered sugar together in a small bowl.

Drizzle the icing over the cinnamon rolls and serve.