Amazing blueberry coffee cake that tastes just like a blueberry muffin. It’s moist and fluffy, with a wonderfully crunchy streusel topping. So perfect when served warm with a cup of coffee!
Whisk together milk, egg, egg yolk, and vanilla until well combined. Add the cooled brown butter and whisk until well combined.
Slowly add brown butter and milk mixture to the flour and stir with a wooden spoon until combined.
In a medium bowl, toss blueberries with 2 tablespoons of flour. Gently fold blueberries into the batter.