Berliners (Jelly-Filled Donuts) | Saveur

Ingredients

• 2 (1/4-oz.) packages active dry yeast
• 1 ¹⁄₂ cups milk heated to 115°
• 1 ¹⁄₂ cups sugar
• 4 tbsp. unsalted butter, softened, plus more for greasing
• 1 tbsp. vanilla extract
• 1 tsp. kosher salt
• 1 egg, plus 3 yolks
• 4 ³⁄₄ cups (1 lb. 5 oz.) all-purpose flour, sifted, plus more for dusting
• Canola oil, for frying
• 2 cups seedless strawberry or plum jam, for filling