Ice cream is a sweet treat that is easy to fall in love with, and it tastes all the more heavenly in summer, when hot days and humid nights beg for something cool on the tongue. And if you churn it yourself, that’s really something to scream about. You don’t even need fancy ingredients — just eggs, cream, milk and sugar and whatever flavorings and mix-ins you might have a yen for.

Chocolate, vanilla and strawberry are the favorites, and cool treats made with other flavorings and fruits also are common. What’s more unusual are vegetable ice creams. At last month’s Picklesburgh bonanza on the Rachel Carson Bridge, Pittsburgh Ice Cream Co. scooped up dill pickle-flavored ice cream made from milk from Family Farm Creameries along with a cream cheese ice cream studded with capers and (gulp!) salmon.

We know — they are for the adventurous. But owner Nathan Holmes is pretty sure you’d love his roasted beet ice cream, and he’s right. Extra creamy with the addition of goat cheese and yogurt, the jewel-toned dessert tastes so fresh and healthful — just the right amount of sweet balanced with the exact amount of earthy. And the color is gorgeous.

Vegetables as a flavor base for ice cream might seem strange to some, “but we’re trying to use what’s in season, and people before us have done stranger things,” says Mr. Holmes, who has been churning his specialty ice creams and sorbets since 2014. He offers Jeni’s Splendid Ice Creams as an example. The artisan ice-cream company based in Columbus, Ohio, lists sweet corn and fennel among its flavors.

There’s also Haagen-Dazs, which in 2014 introduced its Spoon Veg lines of vegetable ice cream in Japan with a Tomato Cherry flavor (a combination of cherry juice and tomato paste) and Carrot Orange (a blend of concentrated carrot juice, orange juice concentrate, orange pulp, and orange peel).

Locally, Katie Heldstab, co-founder of Leona’s Ice Cream Sandwiches, is another artisan ice cream maker pushing the envelope with flavor. Several of the hand-crafted creations by Ms. Heldstab and her wife, Christa Puskarich, are enhanced with balsamic vinegar or alcohol, and while the majority feature whatever fresh fruits they can get their hands on, the couple also have embraced the garden veggie.

Rhubarb is a favorite, and last year they made a cucumber ice cream for The Brew Gentlemen Beer Co.’s summer garden party. It proved such a hit that a couple who attended asked to have it at their wedding. They’ve also had success with ube, a purple tuber that’s a popular ice cream flavor in the Philippines.

“We like to try new things as much as we can, and are open to experimentation,” Ms. Heldstab says, “If one of us gets a good idea, we roll with it and riff off of each other. We see where tradition leads us.”

Not that they’re weird for weird’s sake: Ingredients must work well with cream and have flavors that meld together. “You have to figure out what makes it its best self,” she adds.

Ms. Heldstab’s cucumber recipe was inspired by her love for cucumber water. “The fresh flavor from a cuke is the best, so I thought, why not cold-seep it in cream,” she says. She adds a little vodka to keep it from freezing super-hard in the freezer.

With local produce now arriving in spades, you, too, might want to explore vegetable ice cream. But first:

Homemade ice cream is not a whim dessert. Both the liquid base and freezer container have to be extremely cold for the best results (chill at least four hours for the base, 24 hours for the container). It’s also key to start with the freshest ingredients.

Ms. Heldstab likes to begin with fresh pasteurized milk and fresh eggs for the best flavor, and regardless of whether she adds fruits or vegetables, she thinks carefully about water content. Water freezes into ice, so you want to get rid of as much of it as possible, she explains, either by cooking the fruit or veggie down on the stove or oven-roasting it. Otherwise, “it will freeze into a rock,” she says.

Mr. Holmes stresses the necessity of having a good blender or immersion mixer for a smooth and velvety base. Also, because home machines have a limited cooling ability, make sure any add-ins are completely cool, and wait until the very end to fold them in so that they don’t stick to the bottom and get evenly distributed.

If you’re using a custard base, be careful not to overcook it or you’ll end up with scrambled eggs. On the flip side, avoid overmixing the ice cream.Fresh out of the churning step, ice cream has a Dairy Queen consistency; it needs several hours in the freezer to harden into something that scoops well but still is creamy.

Ms. Heldstab likes to add a shot of vodka to the base to make it softer and easier to scoop (alcohol doesn’t freeze), but be careful not to go overboard, or you’ll end up with a gloppy mess.

Lastly, once your ice cream is spun, quickly get it out of the bowl and into a freezer-safe container to keep it from turning crunchy. Never freeze it in the container — it could end up damaging it when it sticks to the sides. Plus, you need it clean and properly chilled for the next time.

To serve, always let your ice cream sit on the counter for a few minutes to soften. Not only will that save you from bent spoons, but it’ll be kinder on the taste buds. The colder the ice cream, the less sweet it tastes.

If you don’t have an ice cream maker, or it malfunctions half-way through churning like mine, don’t fret. Make it the low-tech way using two zip-top bags. Place the chilled base in a quart-size bag, add four cups of ice and ½ cup of salt to a gallon-size bag, place the base bag inside and shake, shake, shake. You’ll need oven mitts or a dish towel to keep your hands from freezing, but it works. Ice cream!

Gretchen McKay: gmckay@post-gazette.com, 412-263-1419 or on Twitter @gtmckay.

■

Sweet Corn and Thyme Ice Cream

PG tested

This tastes like a cold, creamier version of creamed corn (no chunks), and the pale yellow color screams “summer.” 

4 ears of corn, shucked

2 cups milk

3 sprigs thyme, plus few leaves for churning

2 tablespoons heavy cream

3/4 cup sugar

9 egg yolks

Cut corn from cob and then combine the corn (including the cobs) in a pot with the milk, thyme and cream. Bring to a simmer over medium heat for 5 minutes.

Remove it from the heat and let it steep for 1 to 2 hours. Then, remove the cobs and thyme; discard them.

Blend corn and milk in a blender well until smooth. Then, return the corn cream to the sauce pot and bring to a simmer again over medium heat.

Whisk sugar and yolks together in a large bowl (vigorously), until light and fluffy. Then, slowly add hot milk mixture to eggs, whisking constantly. Once all of the milk has been beaten into the eggs, pour the contents of the bowl back into same sauce pan and return it to medium heat; cook until slightly thickened, stirring constantly. (The corn and egg mixture should be slightly thicker than maple syrup).

Strain ice cream base through a fine mesh strainer and chill overnight.

Freeze/churn the ice cream base in an ice cream maker, according to the manufacturers directions. Fold in a few thyme leaves toward the end of churning cycle and then place the ice cream in the freezer until you’re ready to use it.

—  Root ‘n Bone, New York City, via thedailymeal.com

■

Cool Cucumber Ice Cream

PG tested

Katie Heldstab, co-founder of Leona’s Ice Cream Sandwiches, suggests pairing this cucumber-flavored ice cream with a vanilla shortbread cookie, or one scented with lavender or rosewater. 

1 medium-size cucumber, scrubbed

2 cups heavy cream

1¼ cups whole milk

3/4 cup sugar

Pinch salt

6 egg yolks

1 teaspoon vanilla

1 ounce vodka (or any other spirit that may complement the flavor)

Turn your home freezer to the coldest setting.

Slice cucumber in half lengthwise and scoop out the seeds, cut in half inch slices and pat dry with paper towel. This gets rid of any additional water. Set aside.

Pour cream into large bowl and refrigerate (I like to use a large glass measuring cup).

Heat milk, sugar and a pinch of salt in a sauce pan. Mix with a wooden spoon or spatula and heat until simmering. Simmer for 1 minute. Take off heat and let cool for 2 to 3 minutes while you prepare your eggs.

In a medium bowl, gently whisk egg yolks to break them up but don’t whip.

Temper egg yolks: Take about a cup of the hot milk mixture and gently whisk egg yolks as you slowly pour the hot milk into the yolks. This raises the temperature of the eggs so they don’t scramble when mixed with the remaining hot milk.

Once warmed up, pour the yolk mixture in back into the sauce pan with the remaining milk. Stir constantly over medium/low heat for a few minutes until the mixture thickens into a custard. Test by dragging your finger across the back of the mixing spoon through the custard. If the line you’ve made holds, it’s ready.

Remove bowl of cream from the refrigerator and set a mesh strainer on top. Pour the custard through the strainer to catch any bits of cooked egg. Add cream to custard and mix gently until combined. Add vanilla and vodka or other spirit. (This will keep the ice cream from freezing too hard.)

Place chopped cucumbers in a zip-top plastic bag and pour the liquid base over it, seal and refrigerate. Or, simply add the cucumber to the bowl, stir and cover tightly with plastic wrap and refrigerate. Let the mix cure 24 to 48 hours.

Strain cucumber out of the mix and discard. Process per your ice cream maker instructions.

Once the ice cream is ready, scoop into a shallow container that has a tight fitting lid. Before sealing the lid, place a piece of plastic wrap on the top of the ice cream to prevent air from touching it. Put it in the freezer for 6 to 12 hours.

Serves 8.

— Katie Heldstab, Leona’s Ice Cream

■

Beet Ice Cream

PG tested

Nathan Holmes of Family Farm Creameries, a cooperative that helps farmstead dairy producers of Western Pennsylvania to get their milk, yogurt and cheeses to market in Pittsburgh, suggests farm-fresh beets and goat cheese for this colorful ice cream recipe. “This is a great time of year for young, tender beets; golden, red, or chioggia will all work,” he says. 

1 cup beets

1 cup sugar

1 tablespoon olive oil

6 ounces goat cheese

2 cups full-fat yogurt

Cut beets in half and roast, face down, covered in foil, in a 450-degree oven until very soft, about 1 hour. It should be easy to remove the outer skin of the beet with your hands at this point.

Cool slightly, then blend beets with sugar and olive oil. You want a very fine beet smoothie consistency, if you feel you have too much water at this point just cook it off in a sauce pan.

Incorporate goat cheese into the warm beet syrup.  When it reaches room temperature, add yogurt. (My choice is goat yogurt from Riverview Dairy.)

Let cool, and then run through your home ice cream machine as directed.

If you like, add orange or lemon zest in the end, or steep beet juice with rosemary or sage for more of an earthy flavor.

Serves 6.

— Nathan Holmes, Family Farm Creameries