In a stand mixer bowl, combine heavy cream, water, yeast, butter, and 1 tablespoon of sugar. Let it sit for 10-15 minutes, then add the egg, remaining sugar, salt, and 2 cups of flour.
½ cup (120 ml) heavy cream, ⅓ cup (80 ml) water, 2 ¼ teaspoons yeast, ¼ cup (57 g) unsalted butter, 1 large egg, 1 teaspoon salt