Strawberry Rhubarb Jam {No Pectin}

This is the Best Summer Jam Recipe

I have made at least one batch of homemade strawberry jam every summer for decades. But, until a couple of years ago, it never occurred to me to add rhubarb. 

Once I did, I knew I'd never go back to plain strawberry because this stuff is crazy good. Even my rhubarb hating husband can't get enough.

"I made a very small batch last weekend, and bought more rhubarb to make a large batch today. It’s so good! Strawberry-rhubarb pie is my specialty, love this crustless option to get the same flavor."

Louise

My 6 Favorite Ways to Eat This Strawberry Jam:

1. Spread over a warm from the oven Flaky Homemade Buttermilk Biscuit
2. Slathered over thick slices of toasted Homemade White Bread OR hearty slices of Homemade Whole Wheat Bread
3. On my favorite fluffy, Everyday Quick Pancakes
4. In Peach Almond Thumbprint Cookies - Use strawberry rhubarb jam in place of peach jam
5. As a delicious filling for soft layers of Vanilla Cake
6. As a replacement for cherry jam in these Cherry Shortbread Crumble Bars

The 4 Secret Ingredients in the BEST Strawberry Rhubarb Jam

There are four ingredients that you should absolutely positively add to this jam that will take it from good to I-am-going-to-quit-my-job-and-go-into-the-jam-business-because-this-stuff-will-make-me-a-fortune. Ready? 

1. Vanilla extract
2. Almond extract
3. Salt
4. Pepper

Wait. Salt and pepper? Please don't click away. For the life of me, I don't understand why all jam recipes don't include salt. Hardly any of them do, which is madness. Madness, I tell you.

Salt is a necessary component to pretty much everything delicious - savory AND sweet. Perhaps especially sweet. Salt balances and rounds out the flavors of sweet foods. Even more importantly, salt makes food taste more like itself. When added in the right proportion, salt brings out the flavor in food, intensifying the food's best qualities. 

In this recipe, just ¾ of a teaspoon of salt intensifies the strawberry and rhubarb flavors to a somewhat shocking degree. If you really wanted to test that statement (hey there, skeptic, I'm talking to you), make two batches - one with salt and one without - and you will absolutely, positively be able to taste the difference. Or, you can just trust me and get on with it. 

Ok. Salt in jam is a good idea. But pepper? Yes. A thousand times, YES!

Just 1 teaspoon of ground black pepper enhances the natural sweetness in the fruit while adding an oh-so-subtle kick and complexity that's going to seriously step up your jam game. (What? You don't have a jam game? Well, you do now.)

Adding Black Pepper to Fruit is Not Unusual

Stop at a roadside fruit cart in Mexico or South America and there's a good chance your fruit will be sprinkled with salt (!) and chili powder. And black pepper in cookies - especially sugar cookies and ginger cookies - is phenomenal.

In Mark Bittman's iconic book, How to Cook Everything, he includes a recipe for strawberries macerated in balsamic vinegar and a couple grinds of black pepper, spooned over vanilla ice cream.

It's the kind of recipe that makes you feel like the secrets of the universe have been suddenly revealed to you. What??? All I had to do to make strawberries and ice cream taste this good is add some vinegar and black pepper??? 

That's the kind of experience you're going to have if you add some salt and pepper to your jam. 

Ok. Enough with salt and pepper. Let's talk pectin.

How to Make Strawberry Rhubarb Jam Without Added Pectin 

Is Pectin Necessary for Jam?

Yes. Pectin is a naturally occurring starch that forms in the cell walls of fruit and vegetables, giving them structure.

When combined with acid and sugar, and heated to 220 degrees F (104 degrees C), it forms a gel that thickens fruit jam, jelly, and preserves.

Do You Have to Add Pectin to Fruit Jam?

No. For the most part, the amount of naturally occurring pectin in fruit is sufficient and there's no need add more.

BUT (there's always a but) - it's important to understand how to draw all that natural pectin out of the fruit you're cooking so that the jam will "set" - i.e., thicken into jam.

In general, the firmer the fruit, the more pectin it contains. Apples, for example, contain a high amount of pectin, while strawberries do not.

Rhubarb, is a big fat rule breaker, because it's BOTH firm and low in pectin. So, because neither strawberries or rhubarb contain much pectin, it's important to understand how to maximize the thickening power of what's in there. 

How to Get the Most Thickening Power from Naturally Occurring Pectin:

• Cook this jam to 220 degrees F (104 degrees C). It's important to make sure that the jam reaches 220 degrees F (104 degrees C), which is jam's "set" point. 
• Add lemon juice. Lemon juice is key to great jam because the acid draws out all the pectin in the fruit and then helps all those strands of pectin bind together so that the jam thickens and "sets". Bonus - lemons themselves contain a high amount of pectin. So, just by adding lemon juice, you'll naturally raise the amount of pectin in your jam.
• Add all the sugar. Yes, this recipe contains 4 cups of sugar, which is more than some recipes and less than others. For this recipe, 4 cups (800g) was the perfect amount. Sugar does a whole lot more in jam than sweetened it up. Sugar binds the water in the fruit so that it can't interfere with thickening. Reducing the amount will leave you with more of a strawberry rhubarb sauce instead of jam. 
• Cook it long enough. You've simply got to let some of the excess water in the fruit evaporate, a process that only happens if you cook it long enough. "Long enough" will vary. For me, with the particular batch of fruit that I used in the strawberry rhubarb jam that you see here, "long enough" was about an hour and a half. If you're working with less (or more) juicy strawberries, or live in a different climate or at a different altitude than I do, "long enough" might be different. So how do you know when you've reached "long enough"? 

How to Know When Jam is Set

Jam thickens as it cools. So, the jam that's bubbling away on the stovetop might be "done", meaning it's cooked long enough to thicken up after you've taken it off the heat and ladled it into jars. But how do you know???

Before you begin cooking your jam, place a small dish in the freezer. After about an hour of cooking, remove the dish and spoon a teaspoon or two of jam onto the frozen dish.

Let it sit for a minute or so, then run your finger through the jam to test it's consistency. The frozen plate will cool the jam down quickly, helping you know right away whether or not the jam is done or needs to cook for a bit longer.

How Long Does Homemade Jam Last?

If you process your strawberry rhubarb jam in a hot water bath, it should keep for up to two years, as long as you store it in a relatively cool, dark place. If you choose to freeze it instead, the jam will maintain fantastic taste and texture for up to 6 months, and probably as long as a year. 

Unprocessed jam stored in the refrigerator (or processed jars that have been opened) should keep for at least 3 weeks. 

More Summer Fruit Recipes

• Homemade Peach Preserves {No Added Pectin}
• Almond Plum Cake
• Sweet Cherry Crumb Pie
• Mixed Berry Cobbler with Sugar Cookie Topping
• Peach Cobbler Muffins

"Love this recipe!!!!! Will certainly use this again. Thanks!"

Kathy