The Best Waffles

Details

Ingredients

• 7 ounces unsalted butter, at room temperature
• 6 tablespoons white sugar
• 2 teaspoons vanilla sugar
• 1 pinch salt
• 6 eggs
• 2 ½ cups all-purpose flour
• 2 teaspoons baking powder
• ⅞ cup heavy whipping cream
• 1 (1.5 fluid ounce) jigger sparkling water, or as needed
• cooking spray