In a large bowl, whisk together flour, brown sugar, cinnamon, nutmeg, salt, baking powder, and baking soda.
In a medium bowl, stir together zucchini, eggs, vanilla, buttermilk, and melted butter.
Add the wet ingredients to the dry ingredients, and stir until just combined. Do not overmix - a few lumps are okay.
Fold in blueberries.
Melt butter in a large non-stick skillet over medium heat.
Drop batter by 1/3 cup. Cook until the top is bubbly and the bottom is golden, about 3 minutes, flip, and cook an additional 1-2 minutes until golden brown.
Adjust heat if needed - for my stovetop, just below medium is perfect.
Serve warm with maple syrup.