Ingredients

• non-stick cooking spray
• 1 cup granulated sugar
• 1 large orange, zested
• 5 large eggs, at room temperature
• 1 1/4 cups all purpose flour
• 1 3/4 teaspoons baking powder
• 1/2 teaspoon fine sea salt
• 1/2 cup buttermilk
• 2 teaspoons vanilla extract
• 1 1/4 cups fresh squeezed orange juice
• 1 (14-ounce) can sweetened condensed milk
• 1/2 cup whole milk
• 2 cups heavy whipping cream, chilled
• 1/4 cup powdered sugar
• 1/2 teaspoon vanilla extract
• orange zest, for garnish (optional)