Huckleberry Crisps

Ingredients

• 6 tbsp. plus 1/2 cup sugar
• 6 tbsp. flour
• 1⁄4 cup rolled oats
• 1⁄4 cup packed light brown sugar
• 1⁄4 chopped walnuts
• 1 tsp. lemon zest plus 2 tsp. lemon juice
• 3⁄4 tsp. vanilla extract
• 1⁄2 tsp. kosher salt
• 1⁄4 tsp. ground cinnamon
• 4 tbsp. unsalted butter, softened
• 4 cups huckleberries or blueberries
• 2 tbsp. cornstarch
• 2 tsp. brandy
• Crème fraîche or vanilla ice cream, for serving