If you've ever longed for a treat that combined the soft, fluffy body of a muffin with the crispy goodness of a cookie, then these blueberry muffin cookies are the answer to your sweet cravings. A delightfully indulgent hybrid, these morsels take the moist and cake-like texture from blueberry muffin and blend it with a chewy sugar cookie's crisp edges.

The secret lies in the blueberries, packed with natural sweetness and moisture - they burst at just the right moment during baking, infusing their fruity flavor into the cookies. To enhance their appeal further, the cookie-muffins feature a cinnamon-sugar streusel topping and a final touch of zesty lemon glaze drizzled over them, balancing them delicately between breakfast and dessert.

Blueberries fill our grocery store shelves all year round, but their seasonal peak varies across regions. California sees an early start, with the blueberry season commencing as early as March. For most other states, April marks the onset of the blueberry season, with the highest production in June and July. The season often extends through September.

Streusel, traditionally a crumbly topping made with flour, sugar, and butter, adds a delightful texture to these blueberry cookie muffins. Its rich flavor is further enhanced by the addition of robust baking spices like cinnamon or nutmeg.

When the sweet treats come fresh out of the oven, a standard large mug or circular cookie cutter is ideal to yield the perfect circular shape. Once cooled, they maintain their freshness in an airtight container at room temperature for up to five days. Alternatively, the cookie dough can be stored frozen in an airtight container for up to three months and can be directly baked from frozen when the cravings kick in.

Baking these cookie-muffins involves simple ingredients like unsalted butter, granulated sugar, one large egg, vanilla extract, all-purpose flour, baking powder, kosher salt, baking soda, and fresh blueberries for the cookies. On the other hand, the streusel involves ingredients like flour, unsalted butter, granulated and light brown sugar, ground cinnamon, and kosher salt. Finally, the glaze logo is made from unsifted powdered sugar and fresh lemon juice. The preparation largely involves beating the cookie ingredients together and then baking them with the streusel topped on the dough. Once baked, drizzle with tangy lemon glaze for your final touch of perfection.