4 Ingredients
  • 6 tablespoons unsalted butter (3 ounces; about 90g)
  • 3 pounds yellow or mixed onions, sliced 1/8 inch thick (1.4kg; about 4 to 5 large onions) (see note above)
  • 1/2 teaspoon (2g) baking soda
  • Kosher salt and freshly ground black pepper
Nutrition
200
10% daily value
4 servings
                                       
                                            low-​carb, vegetarian, gluten-​free
     

Fat

27% 17

Saturated

55% 11

Trans

- 1

Monounsaturated

- 4

Polyunsaturated

- 1

Carbs

4% 11

Carbs (net)

- 9

Fiber

8% 2

Sugars

- 5

Sugars, added

- 0

Protein

3% 2

Cholesterol

15% 46

Sodium

14% 324

Calcium

3% 34

Magnesium

3% 13

Potassium

4% 182

Iron

2% 0

Zinc

2% 0

Phosphorus

6% 40

Vitamin A

16% 146

Vitamin C

10% 9

Thiamin (B1)

5% 0

Riboflavin (B2)

3% 0

Niacin (B3)

1% 0

Vitamin B6

11% 0

Folate equivalent (total)

6% 23

Folate (food)

- 23

Folic acid

- 0

Vitamin B12

2% 0

Vitamin D

85% 13

Vitamin E

3% 1

Vitamin K

2% 3

Sugar alcohols

- 0

Water

- 108
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