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Savory Apple and Caramelized Onion Cake

This rustic apple cake combines tart apples with rich caramelized onions and fresh thyme, baked into a moist, tender loaf with a golden crust. The batter is folded with fruit and onions, then baked until fragrant and slightly cracked on top, offering a delightful mix of sweet, savory, and herbal flavors with a cozy, homey texture.
Prep Time 20 minutes
Cook Time 1 hour
Total Time 1 hour 20 minutes
Course Main Course
Cuisine American
Servings 8
Calories 250 kcal

Equipment

  • 9-inch springform pan
  • Sharp Knife & Cutting Board
  • Large skillet
  • Mixing bowls
  • Whisk
  • Spatula

Ingredients
  

  • 2 large apples tart varieties like Granny Smith or Honeycrisp
  • 1 large onion preferably sweet onions like Vidalia
  • 1 1/2 cups all-purpose flour
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt
  • 2 tablespoons unsalted butter softened
  • 1/2 cup brown sugar packed
  • 2 large eggs
  • 1/4 cup milk
  • 2 teaspoons fresh thyme chopped

Instructions
 

  • Thinly slice the onion and cook on medium heat in a large skillet with a splash of oil. Stir often, and cook until deep golden and fragrant, about 15 minutes. Set aside.
  • Peel and core the apples, then slice into thin wedges. Toss them with a squeeze of lemon juice to keep them bright and prevent browning.
  • In a mixing bowl, whisk together the flour, baking powder, salt, and chopped thyme to evenly distribute the dry ingredients.
  • In another bowl, beat the softened butter and brown sugar with a whisk or hand mixer until fluffy and pale, about 2 minutes. Add eggs one at a time, mixing well after each addition.
  • Gradually fold the dry mixture into the wet ingredients, just until combined. The batter will be thick but smooth.
  • Gently fold in the sliced apples, caramelized onions, and a splash of milk if the batter feels too stiff. The mixture should be thick but spreadable.
  • Pour the batter into a greased 9-inch springform pan and smooth the top with a spatula. Scatter a few sprigs of thyme on top for extra aroma.
  • Bake in a preheated oven at 180°C (350°F) for 50 to 60 minutes. Check for doneness by inserting a toothpick into the center; it should come out clean. The top should be golden and slightly cracked.
  • Allow the cake to cool in the pan for at least 15 minutes—this helps it set and makes removal easier.
  • Gently remove the sides of the springform pan, then serve slices warm or cooled, perhaps with a dollop of cream or a drizzle of caramel for extra indulgence.

Notes

For a more savory twist, add a pinch of black pepper or a sprinkle of grated cheese before baking. The cake keeps well for 2 days and can be reheated gently or enjoyed at room temperature.
Keyword onion, rustic, savory apple cake, thyme