2/3 cup (160ml) whole milk, warmed to about 110°F (43°C)

2 and 1/4 teaspoons (7g) Platinum Yeast from Red Star (1 standard packet)*

1/3 cup (62g) granulated sugar, divided

5 Tablespoons (71g) unsalted butter, sliced into 1 Tbsp-size pieces and softened to room temperature

2 large egg yolks (reserve 2 egg whites for filling and topping)

1 teaspoon salt

2 and 2/3 cups (334g) all-purpose flour (spooned & leveled), plus more as needed and extra for work surface and hands

Filling:

3 Tablespoons (43g) unsalted butter, divided

2 large apples, peeled and thinly sliced into bite-size pieces (2–2.5 cups, or 250–313g)*

1 teaspoon lemon juice

1 cup (200g) packed light or dark brown sugar (or a mix of both)

1/4 cup (31g) all-purpose flour

2 and 1/2 teaspoons ground cinnamon

1/4 teaspoon salt

1 and 1/2 teaspoons pure vanilla extract

1 large egg white (reserved from dough)

Crumble Topping (Optional):

2 Tablespoons (25g) packed light or dark brown sugar

2 Tablespoons (15g) all-purpose flour

1/4 teaspoon ground cinnamon

2 Tablespoons (28g) unsalted butter, cold and cubed

Brush on Assembled Loaf:

1 egg white (reserved from dough)