On low beat in the heavy cream, sour cream, vanilla extract, orange juice and salt until smooth and well combined. On the lowest speed, mix in the eggs, one at a time until combined. Do not mix more than is needed to fully incorporate the eggs.
¾ cup (180 g) sour cream, room temperature, ¼ cup (59 ml) heavy cream, room temperature, 1 tablespoon (15 ml) orange juice, 1 teaspoon (5 ml) vanilla extract , ¼ teaspoon salt, 3 large eggs, room temperaure, 1 large egg yolk, room temperature