Ingredients

• 3/4 cup pure maple syrup
• 1/4 cup blueberries
• 1/2 cup old-fashioned oats
• 1/4 cup all-purpose flour
• 2 tablespoons light brown sugar
• 1/4 cup (1/2 stick) unsalted butter, melted
• 1 cup all-purpose flour
• 2 tablespoons sugar
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon kosher salt
• 1 large egg
• 1 1/2 cups buttermilk
• 2 tablespoons unsalted butter, melted, slightly cooled
• Vegetable oil (for skillet)
• 1 cup blueberries (about 5 ounces)

Instructions

1. Purée syrup and blueberries in a blender until smooth; set aside.
2. For streusel: Preheat oven to 350°F. Combine oats, flour, and brown sugar on a small rimmed baking sheet; drizzle with butter and toss to coat. Bake, stirring occasionally, until golden brown, 15-20 minutes. Let cool. DO AHEAD: Streusel can be made 1 week ahead. Store airtight at room temperature.
3. Preheat oven to 350°F. Combine oats, flour, and brown sugar on a small rimmed baking sheet; drizzle with butter and toss to coat. Bake, stirring occasionally, until golden brown, 15-20 minutes. Let cool.
4. DO AHEAD: Streusel can be made 1 week ahead. Store airtight at room temperature.
5. For pancakes: Whisk flour, sugar, baking powder, baking soda, and salt in a large bowl. Whisk egg, buttermilk, and butter in a medium bowl, then whisk into dry ingredients. Heat a large nonstick skillet over medium heat and lightly coat with oil. Working in batches, pour 1/4 cupfuls of batter into skillet and top each with 2 tablespoons berries. Cook pancakes until bottoms are golden brown and bubbles form on top, about 3 minutes. Flip and cook until golden brown and cooked through, about 2 minutes longer. Serve pancakes topped with syrup and streusel.
6. Whisk flour, sugar, baking powder, baking soda, and salt in a large bowl. Whisk egg, buttermilk, and butter in a medium bowl, then whisk into dry ingredients.
7. Heat a large nonstick skillet over medium heat and lightly coat with oil. Working in batches, pour 1/4 cupfuls of batter into skillet and top each with 2 tablespoons berries. Cook pancakes until bottoms are golden brown and bubbles form on top, about 3 minutes. Flip and cook until golden brown and cooked through, about 2 minutes longer. Serve pancakes topped with syrup and streusel.