Blackberries in season from late spring through mid fall

You may have noticed that some blackberries taste bitter, while other summer berries like raspberries or blueberries don’t. The stem end and core in the blackberries contains the bitter compounds.

Adding sugar or fat (like heavy cream / whipped cream) balances out the bitterness, and salt reduces our ability to taste it. The bitter compounds also break down with heat, so a pork tenderloin simmered with blackberries will taste less bitter, as will a blackberry pie.

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Why are blackberries bitter?

The amount of time the blackberry was allowed to ripen affects how bitter or sweet it will be. Unripe berries start out bitter and that lessens as they ripen on the vine. When picked fully ripe they are very sweet with no trace of bitterness.

Unripe blackberries often make their way into grocery stores because they ship better and store longer (two things grocery stores prioritize). Once the berries are picked, they no longer get sweeter (or less bitter). However, they’ll still have their characteristic dark color, making it nearly impossible to tell how they’ll taste just by looking at them.

Farmers markets usually have better quality than the grocery store (as they don’t need to be picked unripe to endure shipping). Most sellers at farmers markets also let you sample the fruit, so you know exactly how sweet they will be before buying.

Lastly, weather and growing conditions can affect bitterness. Most experts agree under-watering or below-average rainfall results in higher levels of bitter compounds in blackberries. But on the flip side, heavy rainfalls shortly before harvest can dilute their flavor.

How to reduce bitterness

You did your best to find ripe, sweet blackberries and now you’re stuck with a bitter disappointment. When eating fresh out of hand, there isn’t anything you can really do to save them. But on the up side, there’s a lot you can do make them taste great for anything else.

Remove seeds

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Bitterness is concentrated in the white core and seeds. While you can’t really ‘core’ a blackberry, you can at least remove seeds in certain cases. For example, if you’re making a sauce, jam, ice cream, or smoothie, you can easily strain out the seeds.

Balance bitter with fat

Rich food often benefits from a little added bitterness, and the other way around. In the case of blackberries, adding to ice cream creates a balanced sweet-fat-bitter combination that can actually end up more interesting. You can also try eating fresh berries with whipped cream.

Blackberries and cheese pair well together too, making them a nice addition to a charcuterie board.

Adding to salads can work if done right. Use mild greens (avoid bitter ones like endive), then add blackberries, a fatty meat like prosciutto, cheese, and a good olive oil dressing (more fat).

Blackberry recipe collection.

Add sugar & salt

Sugar will mask some bitterness, making jams, syrups, sauces, ice creams, and pies a good option. They also work well when paired with other, sweeter fruit like peaches.

Salt reduces our ability to taste bitterness, so using blackberries in savory food works out really well and often adds extra complexity to the dish. Pork, steak, duck, and venison all pair well with a blackberry sauce or reduction.

Use heat

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The bitter compounds break down with heat, so you can turn to baking or stove-top cooking to fix your blackberries. This is one of the best options, in my opinion, because it allows you to use several methods at the same time.

For example, blackberry pie uses sugar, a tiny amount of salt (that may or may not be enough to reduce bitterness), and heat. Pairing meat with a blackberry reduction uses heat, salt, and often sugar.

You can also get creative and cook blackberries down into a sauce before adding to a smoothie, ice cream, or even a salad dressing.

Super-tasters & bitter receptors

If you’ve tried to reduce bitterness and it still doesn’t seem like enough, perhaps you are a super taster. About 25% of people are super tasters, which means they have twice as many taste buds (or even more) than the average person. This means flavors are more intense, from bitterness to the heat from a hot sauce.

Some people are also able to detect certain bitter compounds, while others cannot. I attended a food conference where we used test strips (like these) to determine who could sense bitterness. I was able to detect the bitter compound being tested and I also was identified as a super taster.

That test strip tasted so extremely bitter to me that I couldn’t get the taste out of my mouth for an hour. Meanwhile other people shrugged it off, claiming it just tasted like paper.

Buy boysenberries or another fruit

Boysenberries look like a red-purple version of blackberry rather than the blue-black color of blackberries. Boysenberries are actually a cross between a raspberry and blackberry, making them sweeter and usually less bitter than blackberries.

Most any recipe will work when substituting boysenberries, from pies to reductions for meat. Raspberries can also work but don’t add as much complexity to meat dishes. They also tend to add sweet on top of more sweet for desserts that call for blackberries (which are relying on some of the bitterness for balance).

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