This recipe will make about 8-10 waffles. So if you want to keep the cooked waffles warm while working through the rest of the batter, here's what to do. Preheat your oven to 200°F and place a wire rack on a baking sheet. Place cooked waffles on a wire rack in a single layer. The wire rack will allow the air to circulate around the waffles, which will help prevent them from getting soggy.