Begin by measuring out 120 grams of all-purpose flour using a food scale. This precise measurement ensures consistency in your pancake batter, resulting in perfect pancakes every time.

Next, crack open a large egg and carefully separate the white from the yolk. Place the egg white in a mixing bowl and set the yolk aside for later use. Using an electric hand mixer, beat the egg white for 3-4 minutes until stiff peaks form. This step is crucial for achieving fluffy pancakes.

In a large mixing bowl, combine the flour, sugar, baking soda, baking powder, and a pinch of salt. Stir the dry ingredients together until well incorporated. This ensures even distribution of the leavening agents and sugar throughout the batter.

Pour the buttermilk and melted butter into the bowl of dry ingredients. Add the reserved egg yolk as well. Gently stir the mixture until the ingredients are just combined. Be careful not to overmix, as this can result in tough pancakes.

Allow the pancake batter to rest for 5 minutes. This brief resting period allows the gluten in the flour to relax and the flavors to meld together, resulting in tender and flavorful pancakes.

After the rest period, carefully fold the beaten egg white into the pancake batter until just incorporated. The whipped egg white adds volume and lightness to the batter, contributing to fluffy pancakes.

Preheat a griddle or non-stick skillet over medium heat. Lightly grease the surface with cooking spray or a small amount of butter to prevent the pancakes from sticking.

Using a measuring cup or ladle, pour approximately ¼ cup of batter onto the preheated griddle for each pancake. Cook the pancakes for 3-4 minutes on one side, or until bubbles form on the surface and the edges begin to set.

Carefully flip the pancakes using a spatula and cook for an additional 2-3 minutes on the other side, or until golden brown and cooked through. Repeat this process with the remaining batter, adjusting the heat if necessary to prevent burning.

Once cooked, transfer the pancakes to a plate and serve them hot with your favorite toppings, such as butter, maple syrup, fresh fruit, or whipped cream. Enjoy these delicious and fluffy homemade pancakes for a delightful breakfast or brunch!