Ingredients

• 2 cups all-purpose flour
• 1/4 cup sugar
• 1 teaspoon baking powder
• 1/2 teaspoon salt
• 1 packet (about 2 1/4 teaspoons) active dry yeast
• 2 eggs, separated
• 1 3/4 cups milk
• 1/2 cup vegetable oil
• 1 teaspoon vanilla extract

Instructions

Activate the Yeast:

Warm a small portion (about 1/4 cup) of the milk to 110°F (43°C). It's crucial not to overheat to avoid killing the yeast. Dissolve the yeast and just a pinch of the sugar into the warm milk. This small amount of sugar helps to activate the yeast without speeding up the process too much. Let sit for 5-10 minutes until frothy. Using only a pinch ensures the yeast activates steadily, leading to a balanced fermentation.

Prepare Wet Ingredients:

• In a large bowl, lightly whisk the egg yolks.
• Add the remainder of the milk, vegetable oil, and vanilla extract to the yolks. Stir in the activated yeast mixture. Here, we're using all specified amounts of the wet ingredients to ensure the batter has the right consistency and flavor.

Mix Dry Ingredients:

In a separate bowl, whisk together the flour, the remaining sugar, baking powder, and salt. Using all the sugar here (except for the pinch used earlier) ensures the waffles will have a balanced sweetness.

Combine Wet and Dry Ingredients:

Make a well in the center of the dry ingredients and pour in the wet ingredients. Stir until just combined to avoid overdeveloping the gluten, which could make the waffles tough.

Fold in Egg Whites:

In a clean bowl, beat the egg whites to stiff peaks. This step is critical for incorporating air into the batter, contributing to the waffles' lightness. Gently fold the beaten egg whites into the batter until just combined. This incorporates air and should be done gently to maintain the batter's lightness. Let the Batter Rest:

Allow the batter to rest for 30-60 minutes in a warm place. This resting period lets the yeast work, causing the batter to rise and develop flavor.

Cook the Waffles:

Preheat your waffle iron according to the manufacturer's instructions. Pour the appropriate amount of batter onto the hot waffle iron and cook until the waffles are golden and crispy, usually about 4-5 minutes, depending on your iron.