Boules De Berlin

Ingredients

• 1 tablespoon active dry yeast
• 1/4 cup plus 3 tablespoons warm water (100 degrees to 110 degrees)
• 2 cups all-purpose flour, plus more for dusting
• 1 tablespoon sugar, plus more for rolling
• 2 tablespoons dry milk
• 1 pinch of salt
• 2 large eggs, room temperature
• 2 tablespoons light rum
• grated zest of 1 lemon
• 4 tablespoons unsalted butter, room temperature
• vegetable oil, for greasing bowl and frying
• 1 cup raspberry jam or francois payard's pastry cream (creme patissiere), for filling doughnuts