Roti Muffin Blueberry

Bahan-bahan (1 porsi)

• 1 stick (8 tablespoons) salted butter, melted
• 3/4 cup brown sugar
• 1 cup plain Greek yogurt
• 3 eggs
• 2 teaspoons vanilla extract
• 1 1/2 cups whole wheat or all-purpose flour
• 2 teaspoons baking powder
• 1 teaspoon salt
• 1 1/2 cups fresh or frozen blueberries
• 1 tablespoon whole wheat or all-purpose flour
• 1 tablespoon granulated sugar for sprinkling (optional)
• 2 tablespoons blueberry jam
• 1/2 cup dark brown sugar
• 1 tablespoon all-purpose flour
• 1 tablespoon cinnamon
• 2 tablespoons salted butter, melted