Whisk together the eggs and yolk in a medium bowl.
2 eggs, 1 egg yolk
Add the flour, sugar and salt and whisk until smooth.
4 ounces cake flour, 2 tablespoons granulated sugar, 1/8 teaspoon salt
Gradually add the milk and cream. The mixture should be thin. You can add more milk and/or cream if needed.
5 ounces whole milk, 5 ounces heavy cream
Strain through a fine mesh strainer before using.
Heat an 8-inch skillet on medium. Brush a thin layer of butter onto the bottom of the pan (just enough to coat it) with a silicone brush.
butter
Scoop out about 3 tablespoons of batter (slightly less than 1/4 cup). Pull the skillet off the heat and pour in the batter turning the pan side to coat the entire bottom with the batter.
Cook for 1-2 minutes or until the bottom is lightly browned.
Using a spatula, pull the edges of the crepe away from the pan, then slide the spatula underneath to lift and flip the crepe.
Cook an additional 1-2 minutes or until lightly browned. Remove to a plate and repeat with more butter and batter until all the batter is used.