01 -
Set oven temperature to 350°F. Slice butter into pieces, place in a 9x13 inch baking dish, and allow it to melt in the oven as it preheats. Remove dish once butter is fully melted.
02 -
Combine blueberries, sugar, and lemon zest in a mixing bowl. Stir to mix evenly.
03 -
In a separate bowl, whisk together flour, sugar, baking powder, and salt. Incorporate milk until just combined, avoiding overmixing.
04 -
Pour blueberry mixture evenly over the melted butter in the baking dish. Drizzle batter atop the blueberries. Lightly sprinkle ground cinnamon over the surface.
05 -
Bake at 350°F for 35 to 40 minutes, or until the top is golden and set.
06 -
Allow to cool slightly before serving warm. Optionally accompany with a scoop of ice cream.