Stir together the sour cream and ranch dressing in a small bowl. Cover and refrigerate until serving. This is the dip for your zucchini sticks.
Cut the zucchini into sticks about ¼ inch thick and 3 inches long. Pat them dry with paper towels.
Mix the flour, salt and pepper in a shallow dish. Beat the egg and milk together in a second shallow dish. Place the bread crumbs in a third shallow dish.
Coat each zucchini stick in the flour mixture, then the egg, and finally the bread crumbs, pressing the crumbs on firmly. Set the breaded sticks on a plate and let them rest for 10 minutes so the coating sets.
Meanwhile, heat about 2 inches of oil in a deep fryer or heavy pot over medium-high heat to 375°F.
Fry the sticks in small batches until golden brown, about 3 to 4 minutes. Drain on paper towels for a couple of minutes. Serve hot with the dip and enjoy.
Notes
Air fryer: Spray the breaded sticks with oil and air fry at 400°F for 8 to 10 minutes, turning halfway, until golden and crispy.Oven: Spray the breaded sticks with oil and bake on a parchment-lined sheet at 400°F for about 20 minutes, turning once, until golden brown.Make ahead: Freeze the breaded, uncooked sticks on a baking sheet, then store them in a freezer bag for up to 2 months. Cook from frozen, adding a minute or two.Adapted from: Deep-Fried Food.