Ravishing Raspberry Brunch Bake

Ingredients

• 10 eggs
• 2 3/4 cups half-and-half
• 1/3 cup plus 2 tablespoons white sugar, divided
• 1/3 cup brown sugar
• 1 tablespoon vanilla extract
• 1 teaspoon orange zest
• 1/2 teaspoon kosher salt
• 10 cups challah bread or brioche bead, day-old, diced into 1-inch pieces
• 1 (12-ounce) container fresh raspberries
• powdered sugar, optional, to taste, for serving
• maple syrup, optional, to taste, for serving