Dreamy Swirled Blackberry Lavender Sheet Cake Recipe - Beard and Bonnet

Ingredients

• 2 cups all-purpose flour
• 1 cup granulated sugar
• ½ cup unsalted butter
• 2 large eggs
• ½ cup whole milk
• 8 ounces (226 grams) white chocolate
• 1 cup unsalted butter (for frosting)
• 4 cups powdered sugar
• 2 cups fresh blackberries
• 2 tablespoons lavender buds
• ¼ cup granulated sugar (for jam)
• 2 teaspoons baking powder
• ½ teaspoon salt
• 2 teaspoons vanilla extract
• 1 tablespoon heavy cream
• ¼ teaspoon lavender extract