Combine spinach, flour, sparkling water, eggs, Parmesan cheese, baking powder, garlic, vinegar, salt, and black pepper together in a bowl until batter is evenly combined.
Heat enough oil to cover the bottom of a large skillet over medium heat. Spoon batter into the hot oil, keeping about 1 inch between each croquette. Cook until golden brown, about 90 seconds per side. Repeat with remaining batter.
Substitute beer for the sparkling water, if desired.
Canola, peanut, or coconut oil can be used for frying.
We have determined the nutritional value of oil for frying based on a retention value of 10% after cooking. The exact amount will vary depending on cooking time and temperature, ingredient density, and the specific type of oil used.
Per Serving: 88 calories;3.8 g fat;
9.5 g carbohydrates;
4.3 g protein;
34 mg cholesterol;
138 mg sodium.