For my mom, Du-pars was an iconic diner. The waitresses just looked SO AMERICAN. My mom felt like she was on Happy Days, waiting for Fonzie to walk in. Mom struggled with American food -- like, a Caesar Salad was exotic -- but with pancakes you can’t go wrong. Du-pars' pancakes were her first comfort food in her new home. And we ended up making a ton of pancakes as a family.
Whisk together the flour, sugar, baking powder, baking soda and salt in a medium bowl. Add the buttermilk and egg yolks to the flour mixture. Whisk together until everything is coated with the liquid.
Melt the butter in a saute pan over medium heat. Continue to cook, swirling the pan occasionally, until the butter is golden brown. Pour the butter into the batter and whisk everything together just until all ingredients are incorporated. Let the batter sit on the counter for 30 minutes or overnight in the fridge to thicken and let the buttermilk work its magic.
Before cooking, in a small bowl, whisk the egg whites until fluffy and stiff. Fold the egg whites into the pancake batter.
Heat a large cast-iron skillet over medium-low heat for about 5 minutes. Heavily grease the skillet with oil. Use a measuring cup to ladle about 1/3 cup batter per pancake into the skillet, being careful not to overcrowd the surface of the skillet. Sprinkle with some Cinnamon Streusel. Cook until bubbles form on the top of the pancakes and the bottoms are golden brown, 2 to 4 minutes. Flip and cook until the other sides are lightly browned. Serve hot with clarified butter and syrup.
Preheat the oven to 350 degrees F. Line a baking sheet with a silicone baking mat.
Using your fingers or a food processor, combine the flour, brown sugar, cinnamon and salt. Mix in the butter until crumbly. Spread the mixture on the prepared baking sheet and bake for 10 minutes. Break the mixture apart and mix the streusel. Let cool.