Caramelized Onion and Kale Frittata

This onion and kale frittata is perfect for any weekend brunch or meal prep. Make it ahead on a Sunday night so you’ll have breakfast ready all week!



  • 1 large yellow onion (thinly sliced)
  • 2 tablespoons grass-fed butter
  • 1 cup kale of choice
  • 1/4 cup water
  • 3/4 teaspoons salt
  • 1/4 teaspoon ground pepper
  • 8 large eggs
  • 1/2 cup unsweetened milk or cream of choice


  1. Heat a large pan over medium heat and melt butter. Add sliced onions, 1/2 teaspoon salt, and a pinch of pepper.
  2. Cook onions for 7-10 minutes until cartelized and golden brown. Add a few tablespoons of water at a time if pan gets dry to prevent burning.
  3. Add kale and cook with onions for 2-3 minutes until wilted. Remove pan from heat and let cool.
  4. Preheat oven to 350°F and coat a 9-inch pie pan with non-stick spray or butter.
  5. Add eggs, milk, 1/4 teaspoon of salt, and a pinch of pepper to a high-speed blender or large bowl. Mix well until light and fluffy.
  6. Add onions and kale to prepared pan in an even layer. Pour egg mixture onto onions. Bake for 25-30 minutes until top is golden brown and eggs are just set.
  7. Option to add shredded cheese for even more flavor.


Keywords: Onion and Kale Frittata