Choux Doughnuts Recipe

Ingredients

• 115 g (1 stick) unsalted butter
• 15 g (1 tablespoon), plus about 400 g (2 cups) more for coating the donuts
• 2 g (1/4 teaspoon) kosher salt
• 150 g (1 cup plus 1 tablespoon) all-purpose flour
• 4 large eggs (about 200 g), at room temperature
• 1760 g (2 quarts) vegetable oil (enough to fill the pot halfway for frying)
• 150 g (3/4 cup) mascarpone cheese
• 40 g (3 tablespoons) sugar
• 4 g (1 teaspoon) pure vanilla extract
• Pinch kosher salt
• 120 g (1/2 cup) heavy cream