Zucchini Pancakes

2 medium zucchini (about 3/4 pound)

2 tablespoons grated red onion

2 extra-large eggs, lightly beaten

6 to 8 tablespoons all-purpose flour

1 teaspoon baking powder

1 teaspoon kosher salt

1/2 teaspoon freshly ground black pepper

Unsalted butter and vegetable oil

Preheat the oven to 300 degrees F.

Grate the zucchini into a bowl using the large grating side of a box grater. Immediately stir in the onion and eggs. Stir in 6 tablespoons of the flour, the baking powder, salt, and pepper. (If the batter gets too thin from the liquid in the zucchini, add the remaining 2 tablespoons of flour.)