We take our ice cream consumption pretty serious in my house. But combining that with an activity? Um, yes please! Making ice cream in a bag is a cool science experiment and tasty summer project rolled into one. No fancy machine needed—just a few simple ingredients, two plastic bags, and some elbow grease!
Ice Cream in a Bag
(2 small servings)
What you need:
- 1 cup milk or half-and-half*
- 2 Tbsp. sugar
- 1/2 tsp. vanilla extract
- Ice (about 3 cups)
- 1/3 cup salt (rock or kosher works best)
- 1 quart-sized plastic resealable bag (for ingredients)
- a gallon-sized plastic resealable bag (for shaking)
- Gloves or towel
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(pictures by Tatiana Sayig, Publisher of Macaroni Kid Five Towns - Valley Stream - The Rockaways, N.Y.)
Directions:
- In the quart-size bag, combine the half & half, sugar, and vanilla extract. Seal tightly, removing as much air as possible.
- Fill the gallon-size bag halfway with ice, then add the salt.
- Place the small bag inside the large one and seal the big bag tightly. Now the fun begins—shake, shake, shake for 5–10 minutes. Wear gloves or wrap the bag in a towel to protect your hands from the cold.
- After 5–10 minutes, carefully remove the smaller bag. If the mixture has firmed up into ice cream, you’re done! If it’s still a bit soft, seal it back up and shake for a few more minutes.
- Wipe off the outside of the small bag (so no salty water gets in), then scoop your homemade ice cream into a bowl or eat it straight from the bag. Add sprinkles, crushed cookies, or fruit if you like!
*whole milk makes a creamier ice cream, but 1% or 2% can work!
🥄 Tips and Variations:
- Flavor it up: Try chocolate milk, strawberry syrup, or a spoonful of peanut butter mixed in.
- Dairy-free? Use coconut milk or almond milk with a touch of cornstarch for creaminess.
- Add-ins: Mini chocolate chips, crushed Oreos, or fruit puree mix in easily once the ice cream is semi-firm.
🧪 Why It Works: A Little Kitchen Science
When salt is added to ice, it causes the ice to melt at a lower temperature. That super-chilled brine absorbs heat from the ice cream base, helping it freeze quickly without a machine. It's science you can eat!
Whether you're making it with kids, hosting a summer party, or just craving a DIY dessert, ice cream in a bag is a sweet success every time. Give it a shake and treat yourself to homemade coolness!
