Sweet-and-Sour Pearl Onions
Flat borettane pearl onions from Emilia-Romagna, slowly glazed in a glossy sweet-and-sour syrup of sugar and white wine vinegar with a bay leaf. A classic Italian contorno, equally at home on an antipasto board.

- prep 20 min
- cook 40 min
- total 60 min
- serves 4
- easy
- vegetarian
- Italy
Ingredients
- 500 g Borettane onions
- 60 ml White wine vinegar
- 2 tbsp Sugar
- 2 tbsp Extra-virgin olive oil
- 20 g Butter
- 1 leaf Bay leaf
- 60 ml Water
- 1 pinch Salt
Steps
- Bring a pot of water to a boil, drop in the borettane onions, and blanch for 2 minutes.
- Drain, let cool slightly, then trim the root end and slip off the papery skins; the onions should stay whole.
- Melt the butter with the olive oil in a wide pan over medium heat.
- Add the peeled onions in a single layer and let them brown gently for 5 to 6 minutes, turning occasionally so they color all over.
- Sprinkle the sugar over the onions and let it dissolve and lightly caramelize, swirling the pan, for about 2 minutes until it turns pale amber.
- Pour in the white wine vinegar, add the bay leaf, and season with salt.
- Stand back as it sizzles, then add the water and stir to loosen the caramel.
- Lower the heat, cover, and simmer gently for about 25 minutes, turning the onions now and then, until they are tender when pierced.
- Uncover, raise the heat, and let the liquid reduce for 5 to 8 minutes until it becomes a glossy syrup that coats the onions.
- Discard the bay leaf.
- Serve warm or at room temperature, spooning the glaze over the onions.
- They keep well in the fridge and are even better the next day.
Tips
- Blanching for 2 minutes makes the papery skins slip off effortlessly without overcooking the onions.
- Choose onions of similar size so they cook evenly and stay whole; the flat borettane variety is ideal.
- If the glaze tastes too sharp, add a pinch more sugar; if too sweet, a splash more vinegar restores the balance.
≈ 150 kcal · 2 g protein · 20 g carbs · 7 g fat — per serving, estimate