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Strawberry and Grapefruit Marmalade

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This combination of strawberry and grapefruit for Strawberry and Grapefruit Marmalade is a match made in heaven. A cooked jam recipe with inversion-sealing method.

Strawberry and Grapefruit Marmalade in a glass bowl with jars of marmalade to the side

I’m always looking for unusual combinations in jams or preserves and this strawberry and grapefruit marmalade recipe is the mother-lode. Spring is the perfect time to combine these fruits that you normally don’t see together. Grapefruit is usually at its peak in mid to late winter around here and the best deals for strawberries are in the spring. But right now I’m finding the juiciest, full-flavor red grapefruit crop and it’s April! So, here we are with this match-made-in-heaven of a marmalade!

I will tell you that if you’ve never made jam before, this is not the recipe I would necessarily start out with as an easy dump and stir experiment. But if it’s maybe your second time? Not difficult, but just needs a few extra steps. Well worth the extra time, for sure. This marmalade is both tart and sweet. And can you believe the color! You might just want to eat it with a spoon. Delicious on buttermilk biscuits, too.

This recipe will give instructions for the inversion-method of preserving jam in canning jars so they can last on your shelf for up to 12 months. You could certainly make them into freezer marmalade, but if you haven’t tried the inversion-method, give it a try. I have NEVER (knock on wood) had my jam not seal with this method and they have never gone bad. Just follow instructions and do not alter ingredient amounts. I always make my jams with Sure-Jell Low Sugar pectin in the pink box. I don’t use artificial sweeteners as they are less healthy than sugar. But I’m convinced one of the reasons my jams and preserves are a big hit with family and friends is because the low sugar version lends more fruit flavor and still plenty of sweetness. You just won’t get as many jars of finished product.

So, let’s dive in:

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5 from 3 votes

Strawberry and Grapefruit Marmalade

Use ripe fruit but not over-ripe. This recipe is for cooked jam using the inversion method of sealing the jars.
Course Jams and Preserves
Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings 8 pint jars
Calories 586
Author Good Dinner Mom

Ingredients 

  • 4 - 5 large ruby red grapefruit
  • 4 pints strawberries
  • 1 whole lemon
  • 1 teaspoon butter
  • 1 box low sugar Sure-Jell Pectin, Pink Box
  • ⅛ teaspoon baking soda
  • 4 cups sugar

Instructions

  • First prepare the fruit:
  • Using a vegetable peeler, remove only colored part of peel from grapefruit; chop and set aside. Peel and discard white part of peel from fruit. Section out the pulp, save any juice with the fruit and remove any seeds. Clean and chop the strawberries into large 1" chunks (they will break-up more in cooking).
  • Prepare jars and lids:
  • Prepare 8 1-pint mason jars; wash in very hot water or in dishwasher. Place lid-caps (portion with the rubber seal) in a pan of water and bring to boil. Reduce heat and keep hot until ready to use.
  • Prepping grapefruit and peels:
  • Place grapefruit peels, 2 ½ cups water and ⅛ teaspoon baking soda in saucepan. Bring to boil. Reduce heat; cover and simmer 20 minutes, stirring only occasionally. Add grapefruit and juice; simmer 10 minutes. Remove from heat and combine with cut strawberries until you have 5 ½ cups fruit with juice. Ratio of strawberries to grapefruit doesn't matter. Almost 1:1. Squeeze the juice of one lemon into mixture.
  • Prepare the pectin and sugar:
  • Measure 4 cups sugar into a medium bowl. (Do not reduce sugar). Mix ¼ cup sugar from measured amount and 1 box Sure-Jell For Less or No Sugar Needed Fruit Pectin in small bowl.
  • Cooking the fruit for jam:
  • Place large stock pot (the deeper, the better) on stove. Add the 5 ½ cups fruit to the pot. Stir in the pectin with the ¼ cup sugar into fruit mixture and add 1 teaspoon butter to reduce foaming, if desired.
  • Bring mixture to full rolling boil (a boil that doesn't stop bubbling when stirred) on high heat, stirring constantly.
  • Stir in remaining sugar quickly. Return to full rolling boil and boil exactly 1 minute, stirring constantly. Remove from heat.
  • Quickly, place jars on protected surface on counter. With a large funnel to help prevent spilling, fill all mason jars with the boiling fruit mixture. Fill to ¼" to ⅛" from top of lid. With wet rag or paper towel, wipe off any jam that may have spilled onto top of lid where sill will touch.
  • Place hot ring lids onto jars and then add lid bands. Tighten until you feel resistance and then give it just a bit more tightening so they are tight, but not overly tightened.
  • Immediately turn jars upside down. Remain that way for 5 full minutes, then revert jars back to correct standing position. Jars should seal over next 30-40 minutes or so.

Cook's Note:

  • If any jars don't seal, place in fridge and use within month. Otherwise, sealed jars are good for up to 12 months.
Nutrition Facts
Strawberry and Grapefruit Marmalade
Amount Per Serving
Calories 586 Calories from Fat 18
% Daily Value*
Fat 2g3%
Saturated Fat 0.4g3%
Trans Fat 0.02g
Polyunsaturated Fat 0.5g
Monounsaturated Fat 0.3g
Cholesterol 1mg0%
Sodium 25mg1%
Potassium 756mg22%
Carbohydrates 149g50%
Fiber 10g42%
Sugar 131g146%
Protein 4g8%
Vitamin A 3230IU65%
Vitamin C 233mg282%
Calcium 103mg10%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.

Making jam is so rewarding! And Strawberry Grapefruit Marmalade is so beautiful.

Marmalade in a glass bowl up close

Not to mention delicious. I get many compliments on this marmalade. I think you will, too.

Adapted from Café Sucre Farine and from different recipes I’ve tried and experimented with over the years.

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Published on April 13, 2013

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    Recipe Rating




  1. whitney bells says

    April 4, 2022 at 9:23 AM

    5 stars
    Ohmygosh. This recipe is fantastic! Everyone in our house loved it. Goes great on pretty much anything! Toast, pancakes, French toast, muffins. Cant go wrong. Thanks for the awesome recipe Sally! I just love your blog and your recipes are my go-to when in a rut.

    Reply
  2. susan k says

    April 4, 2022 at 9:18 AM

    5 stars
    We love it! My husband said this was the best thing he has ever had on toast. Such a pretty, vibrant color too!

    Reply
  3. jenny snow says

    April 4, 2022 at 9:15 AM

    5 stars
    This exceeded my expectations, it’s so delicious, and easy. I will definitely be making this again 🙂

    Reply
  4. Georgia Hughes Antonakis says

    April 30, 2014 at 2:35 AM

    I was hoping to find a recipe for grapefruit and strawberry preserve… so glad to find this one today… but I live on Crete Greece and there is no way I’m going to find the special sugar in the pink box you recommend… So my question is… will I be able to make this marmalade with ordinary sugar… and if so, what amount?? Thank you and hope to hear from you soon..

    Reply
    • Sally says

      April 30, 2014 at 1:59 PM

      Hi Georgia,
      The “special sugar in the pink box” is actually not sugar, but pectin. The sugar amount for this recipe is listed separately. The pectin is just used as a thickener and you could leave it out, but the jam will be a bit runny. There are several pectin substitutes listed on the internet and I was going to refer you to some links, but don’t know what all you have available to you. So, I would say either Google “substitute for pectin in jams” (the green apple idea sounds easy) or just leave it out. Good luck and let me know how it goes. 🙂

      Reply
  5. Melanie Lambert says

    April 22, 2013 at 9:00 AM

    This marmalade is like a mouthful of summer! It literally makes me happy when I eat it! I love the tangy and sweet…delicious!

    Reply
  6. Kim says

    April 15, 2013 at 10:04 AM

    We love this with pretzels for a snack. The square waffly type pretzels work best. This is a fun treat for get-togethers. Yummy!!

    Reply
  7. Emily says

    April 13, 2013 at 3:40 PM

    We ate an entire jar of this in one day! Even my marmalade hating 10 year old loved it!

    Reply
    • Sally says

      April 13, 2013 at 3:42 PM

      Emily, I was surprised to get the jar back so quickly! Glad you all liked it.

      Reply
  8. Jaclyn says

    April 13, 2013 at 3:33 PM

    Sally that looks amazingly good! What a great combo. Can’t wait to try it 🙂 the buiscuts looks yummy too!

    Reply
    • Sally says

      April 13, 2013 at 3:43 PM

      Thank you! I hope you like it as much as we do. 😉

      Reply
About Sally - Good Dinner Mom.

About Good Dinner Mom

My name is Sally and I love to be in the kitchen. Making fresh, unique dishes is my way of showing love for family and friends and I hope that here you’ll find recipes of both healthy and indulgent dishes that will inspire you to cook more at home while sharing some love of your own. more about me

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