Perfect Potato Latkes Recipe

Name: Perfect Potato Latkes Recipe
Ingredients: 2 tablespoons rendered chicken fat (schmaltz), plus more for frying; 2 tablespoons olive oil; 2 sweet onions, chopped; 1 teaspoon sugar; Salt and pepper, to taste; 10 Yukon Gold Potatoes, peeled; 2 large eggs, beaten; 1 large egg yolk, beaten; Peanut oil, for frying; 1 bunch chives, chopped finely, for garnish; Sour cream and applesauce, for serving