This blueberry streusel coffee cake makes for an amazing breakfast, but it's also a lovely not too sweet dessert or a perfect mid afternoon snack. It holds up well for a couple days, and yes, you can use frozen or fresh blueberries.
Preheat oven to 370 degrees, and grease a 10 inch springform pan. Ensure all coffee cake ingredients are room temperature, except butter for streusel.
To make the batter, place butter and sugar in a bowl and beat on high until lightened in color and texture. Add the egg, milk, and almond extract while mixing on low speed then beat to combine.
4 tablespoons unsalted butter, 3/4 cup granulated sugar, 1 egg, 1/2 cup milk, 1/2 teaspoon almond extract
Add baking powder, nutmeg, and salt, and mix together on low, scraping down sides periodically. Scoop in flour, and mix until mostly combined.