Soft Blueberry Muffin Cookies with Crunchy Streusel Topping - cookrisp

Ingredients

• 1/2 cup unsalted butter, softened
• 1/2 cup granulated sugar
• 1/4 cup brown sugar
• 1 large egg
• 1 tsp vanilla extract
• 1 1/2 cups all-purpose flour
• 1 tsp baking powder
• 1/2 tsp baking soda
• 1/4 tsp salt
• 1 cup fresh or frozen blueberries
• 1/4 cup granulated sugar
• 2 tbsp all-purpose flour
• 2 tbsp unsalted butter, cold and cubed