Kw-logo-smaller

Science Project: How to Make Homemade Ice Cream

Jan 16, 2014

As warmer spring comes rolling in you might be thinking more and more about cooler sweets to eat, namely ice cream. Or maybe you think about ice cream all the time, no matter what the temperature. Regardless, ice cream is definitely one of the most delicious treats you can have, but did you know you don’t only have to buy it at the store? You can make it yourself!

Ice Cream is also a wonderful demonstration of what salt can do to ice. This is when we get science-y.  Hope you’re prepared!

Water has three states: solid, liquid and gas. Water changes into its solid state when it reaches 0 degrees Celsius (32 degrees Fahrenheit), but if there is Sodium Chloride (NaCl) present, otherwise known as salt, then that temperature drops. That’s because salt lowers water’s freezing point. Have you ever noticed how when the sidewalk is icy they put salt on it to melt the ice and make it safer for walking? That’s the same principle. The salt they put on the sidewalk mixes with the ice and because it's freezing point is lower than the temperature of the unsalted ice, the sidewalk melts.

When you're making ice cream the lower temperature of the ice and salt mixture, which surrounds the cream and sugar mixture, is cold enough to change the state of the cream from a liquid to a solid, hence the name ice cream! So let's get started!

Materials

  • 1/2 cup milk
  • 1/2 cup whipping cream  or heavy cream
  • 1/4 cup white sugar
  • 1/4 teaspoon vanilla extract
  • 1/2 to 3/4 cup sodium chloride (NaCl) aka table salt or rock salt
  • 2 cups ice
  • 1-quart Ziploc bag
  • 1-gallon Ziploc bag
  • Thermometer
  • Measuring cups and spoons
  • Bowls, cups, spoons or cones to serve your ice cream treat

Procedure

  1. Add 1/4 cup sugar, 1/2 cup milk, 1/2 cup cream, and 1/4 teaspoon vanilla to the quart Ziploc bag. Zip that bag up so nothing leaks!
  2. Put the 2 cups of ice into the gallon Ziploc bag.
  3. Use the thermometer to measure the temperature of the ice in the gallon Ziploc bag. Make sure to record this number so you can record
  4. Add 1/2 to 3/4 cup salt (sodium chloride) to the gallon Ziploc bag of ice.
  5. Place the sealed quart bag inside the gallon bag of ice and salt. Seal the gallon bag securely.
  6. Rock the gallon bag from side to side. Hold it at the seal so that the cold ice doesn’t freeze your hands instead of your ice cream. You can also use gloves or a cloth to protect your hands, just remember it will be colder than 0 degrees Celsius!
  7. Continue to rock the bag for 10-15 minutes or until the contents of the quart bag have solidified, or until you can’t wait for ice cream anymore.
  8. Open the gallon bag and use the thermometer to measure and record the temperature of the ice and salt mixture. Notice how much colder it is than the ice on its own.
  9. In bowls or cones serve and most importantly enjoy your homemade ice cream!

Toppings

There’s always the possibility to add all different types of toppings: chocolate sauce, sprinkles, caramel, strawberries, chocolate chips! Feel free to add these ingredients to the quart bag before you mix everything, but know that your mixture will turn to ice cream much faster if you hold these special treats and add them as toppings.

Ice Cream Maker

This is a very easy way to make some delicious ice cream! If you are interested in making your own homemade ice cream all the time you may want to look into an ice cream maker. It still uses the ice and salt mixture to freeze the cream it just provides an easier and higher volume way to make ice cream at home.

Have Your Say!

What’s your favorite ice cream flavor? Share it with us in our comments section below.

Related Articles:

 

99 Comments

latest videos

F1154466813265

Where Was Ice Cream Invented?

  • United States.
  • France.
  • China.
  • Iceland.

related stories

Micro_rock-candy-micro
Did you know crystals aren't just for decoration? If you need some science fair project inspirati...
We all scream for ice cream! Who doesn’t love this yummy, creamy, cool and delicious summer treat...
Have a ball making tasty homemade ice cream in 20 minutes with the Play and Freeze Ice ...
Healthy eating is important, but it's not always easy to know which foods to eat and which foods ...

Random in the forums

LovingGirl10
LovingGirl10 posted in Debating:
Yes. There is life after death. There are two places. One in heaven, & one in Hell.  Those who go to heaven are those who believe in Jesus Christ. Those who go to hell,  are those who don't believe in Jesus Christ & those who working their on way to the wrong god.  If I were you, I will believe in Jesus.  But it is your choice.
reply 31 minutes
arthi
arthi posted in General:
Tired..... And @Gaara : idk what's going on in your life but I seriously hope you ain't gonna do anything stupid [no offense]  Hope you'll feel better :)
reply about 1 hour
GaaraOfTheSand
reply about 2 hours
GaaraOfTheSand
GaaraOfTheSand posted in General:
"raoul123" wrote: "GaaraOfTheSand" wrote: Let's see i want to die suicidal feel like cutting myself Want to die want to die why?? long story and character limit is to short to post it ._,
reply about 2 hours
mimimiya13
Man, I know right? Sooo creepy. Jesus was sooo jesus, it was also jesus and jesus and jesus. Jesus has a few different meanings. 1st Jesus: Jesus 2nd Jesus: weird 3rd Jesus: creepy 4th Jesus: scary 5th Jesus: fit
reply about 2 hours

play online games