Blueberry Muffin Cookies and Streusel Topping - Cook with Carla

Ingredients

• 1/2 cup unsalted butter, brought to room temperature
• 1/4 cup white sugar
• 1/2 cup packed light brown sugar
• 1 large egg, warmed to room temperature
• 1 teaspoon pure vanilla extract
• 1 1/2 cups plain flour (all-purpose)
• 1/2 teaspoon sea salt
• 2 teaspoons of a rising agent, like baking powder
• 1/3 cup blueberry preserve
• 1 cup of whole, fresh blueberries
• 1 teaspoon ground cinnamon
• 1/4 cup chilled butter, chopped into cubes
• 1/3 cup soft brown sugar
• 1/3 cup all-purpose flour
• 1/4 teaspoon salt