Cinnamon Raisin Swirl Buttermilk Bread

Ingredients

• 3 3/4 cups (469g) plus 1/3 cup (42g) all-purpose flour, divided
• 3 tablespoons (36g) granulated sugar
• 1 tablespoon (9g) kosher salt (see note)
• 1 (0.25oz) package (7g) or 2 1/4 teaspoons Platinum Yeast
• 1/4 teaspoon (1.25g) baking soda
• 3/4 cup (180g) whole buttermilk
• 1/2 cup (120g) water
• 3 tablespoons (42g) unsalted butter, cubed
• 1/4 cup (50g) granulated sugar
• 1 1/2 teaspoons (3g) ground cinnamon
• 2 teaspoons (10g) unsalted butter, melted
• 1/2 cup (64g) raisins
• 1 large (50g) egg
• 1 tablespoon (15g) water