essential raised waffles

Name: essential raised waffles
Cuisine: European
Ingredients: 1/2 cup warm water (about 105 to 110 degrees, so not too hot); 1 packet (1/4 ounce, 7 grams or 2 1/4 teaspoons) active dry yeast; 2 cups milk, warmed (again, not too hot; 1 stick (4 ounces or 115 grams) unsalted butter, melted and cooled until lukewarm; 1 teaspoon table salt; 1 teaspoon granulated sugar; 2 cups (250 grams) all-purpose flour; 2 large eggs; 1/4 teaspoon baking soda; Oil or melted butter for waffle iron; Powdered sugar, syrup or berries for serving