Grandmother's Secret Onion Cake Recipe Revealed! Vegetarian,tasty and simple

Ingredients

• 4 large Onion (peeled and thinly sliced)
• 4 pcs Egg (large, at room temperature)
• 6 tbsp All-Purpose Flour (for onion cake batter)
• 2 tbsp Olive Oil (for frying onion cakes)
• 200 g Champignons (cleaned and sliced)
• 1 medium Sweet Pepper (diced; any color)
• 2 tbsp Butter (unsalted, for sautéing vegetables)
• 4 tbsp All-Purpose Flour (for thickening the sauce)
• 180 g Sour Cream (full‑fat, for sauce)
• 1 pcs Lemon (juiced)
• 1 pcs Avocado (ripe, sliced for garnish)

Instructions

1. Prepare the onions

   Peel the 4 large onions and slice them thinly into rings or half‑moons.

   Time: PT5M

2. Make the egg‑flour batter

   In a mixing bowl, whisk together 4 eggs and 6 tbsp all‑purpose flour until smooth.

   Time: PT5M

3. Combine onions with batter

   Add the sliced onions to the bowl, toss to coat evenly. Sprinkle the additional 2 tbsp flour and mix briefly.

   Time: PT3M

4. Fry the onion cakes

   Heat 2 tbsp olive oil in a skillet over medium heat (≈180°C). Spoon one‑third of the onion‑batter mixture into the pan, flatten gently into a cake. Fry 3‑4 minutes per side until golden brown. Repeat for the remaining two cakes.

   Time: PT12M

   Temperature: 180°C

5. Prepare vegetables

   Clean the champignons and slice them. Dice the sweet pepper.

   Time: PT5M

6. Sauté mushrooms and pepper

   In another pan, melt 2 tbsp butter over medium heat (≈180°C). Add the sliced mushrooms and diced pepper, sauté for about 5 minutes until softened.

   Time: PT5M

   Temperature: 180°C

7. Make the creamy sauce

   Sprinkle 4 tbsp flour over the vegetables, stir for 1 minute to cook the flour. Gradually add 180 g sour cream and the juice of 1 lemon, whisk until smooth and heated through.

   Time: PT4M

   Temperature: 180°C

8. Assemble the onion pie

   Place each onion cake on a serving plate, spoon the mushroom‑pepper sauce over the top, and arrange sliced avocado on the surface. Serve immediately.

   Time: PT5M

Nutrition Facts

Calories

520

Protein

14 g

Carbohydrates

35 g

Fat

42 g

Fiber

9 g

Ingredient Substitutions

• Instead of Onion: shallots, leeks
• Instead of Egg: egg replacer, silken tofu (for binding)
• Instead of All-Purpose Flour: rice flour (gluten‑free), spelt flour
• Instead of Olive Oil: vegetable oil, canola oil
• Instead of Champignons: cremini mushrooms, button mushrooms
• Instead of Sweet Pepper: red bell pepper, yellow bell pepper
• Instead of Butter: margarine, olive oil
• Instead of All-Purpose Flour: cornstarch, arrowroot powder
• Instead of Sour Cream: Greek yogurt, crème fraîche
• Instead of Lemon: lime
• Instead of Avocado: guacamole, sliced cucumber

Equipment Needed

• Mixing Bowl
• Whisk
• Frying Pan
• Spatula
• Knife
• Cutting Board
• Measuring Spoons
• Serving Plate

Critical Steps — Do Not Skip

• Coating the onion slices evenly with the egg‑flour batter.
• Frying the onion cakes until golden without burning.
• Thickening the sauce with flour and incorporating sour cream without lumps.

Chef Tips from the Video

• For extra crispness, dust the onion slices with a light coating of flour before adding the egg mixture.
• Use a non‑stick skillet to reduce the amount of oil needed.
• A pinch of smoked paprika in the batter adds a subtle depth of flavor.

Troubleshooting

Storage

Refrigerator: Store leftovers in an airtight container for up to 2 days. Reheat gently in a skillet.

Freezer: Not recommended; onion cakes may become soggy after freezing.

Room temperature: Can sit at room temperature for up to 2 hours before serving.

Make-Ahead Tips

• Prepare the onion‑batter mixture up to step 3 and refrigerate for up to 4 hours.
• The mushroom‑pepper sauce can be made a day ahead; reheat gently before assembling.

Frequently Asked Questions