In a large mixing bowl, combine warm water, sugar, and yeast. Let it sit for about 5 minutes until foamy.

Add the salt and gradually mix in the all-purpose flour. Stir with a wooden spoon until a rough dough forms.

Transfer the dough to a floured surface and knead for about 8-10 minutes.

Place the dough in a greased bowl, cover with a cloth, and let it rise for 1 hour.

Punch down the dough, divide into 8 equal pieces, and shape each into a bagel.

Bring a large pot of water to a boil. Boil each bagel for 30 seconds on each side.

In a small bowl, mix together sugar and cinnamon for the topping.

Preheat oven to 425°F (220°C). Place boiled bagels on a parchment-lined baking sheet, brush with melted butter, and sprinkle with cinnamon sugar.

Bake for 20 minutes until golden brown.