Preheat your oven to 375° F. Line a baking sheet with parchment paper.
Add your flour, baking powder, and high-protein yogurt or skyr to a large bowl. Stir the ingredients together until you get a scraggly dough. Dust your work surface with a little extra flour and dump the contents of your bowl on it. Shape the dough into a ball. If the dough is too sticky, add a little flour, 1 tablespoon at a time, until it becomes manageable.
Divide the dough into 4 roughly equal pieces. Roll them into balls. Use your finger, a chopstick, or a skewer to poke a hole in the center of each ball. Then, gently pull the dough outward to stretch the hole into roughly the size of a quarter. Place each bagel on top of your baking sheet.Optional: If you want to make a wash for your bagels, whisk together 2 tablespoons of yogurt/skyr, together with 1 tablespoon of olive oil and 1 tablespoon of water. Brush the tops of each bagel, generously, with this mixture. Then, sprinkle the top of each bagel with your favorite topping.
Place your bagels in the oven on the top rack and bake for 20 minutes. Then, raise the temperature to 400° F and bake for an additional 5 to 7 minutes. If you used a wash, your bagels will be golden brown. If you did not use a wash, they will be lighter in color but fully cooked. Allow your bagels to cool for about 10 minutes. Enjoy your 3-ingredient bagels with your favorite spread (mine is vegetable cream cheese)!