Brownies In a Jar

from 1 votes

Bread in a jar is so 2010. And cake in a jar? Hello 1908. But brownies in a jar? Now you’re speaking my language.

I figured that if bread, cake and even cookies can squeeze themselves into canning jars, then who’s to say that brownies can’t share in the confectionery claustrophobia?

This unique baking technique seems to be sweeping the food blogosphere. First it was “_____ On a Stick,” and now it’s “_____ In a Jar.” But by far the best part of baking anything in a jar is that there’s an excuse for an ice cream topper, which creates a swirl of creamy vanilla bean and fudgy chocolate, all in a convenient cup. I’d say that beats pickled anything.

The next big craze? I’d like to be the first to guess that “Frozen _____ In an Ice Cube Tray” is about to hit it big. I wish I was kidding. I do it to my pesto. Friends do it to their chicken stock. Dessert cubes are a natural progression.


Brownies In a Jar

Whip up the ultimate individual desserts with this unique technique for Brownies In a Jar topped with your favorite ice cream.
Author: Kelly Senyei
5 from 1 vote
Brownies In a Jar
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Servings 4 servings


  • Butter, for greasing jars
  • Your favorite brownie mix, homemade or a boxed mix
  • Vanilla ice cream, optional


  • Preheat the oven to 350ºF.
  • Thoroughly grease the inside of four clean canning jars with butter. Set aside.
  • Prepare the brownie batter per your recipe's instructions.
  • Pour the batter into each of the greased jars, filling them one-fourth full. Tap the jars lightly on the counter to release any air bubbles. Place the filled jars on a cookie sheet, arranged so that they are not touching each other.
  • Bake the jars for 40 to 45 minutes, or until a toothpick inserted comes out clean.
  • Top with a scoop of vanilla ice cream.
  • ★ Did you make this recipe? Don't forget to give it a star rating below!


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    1. Hi Kas! Newer mason jars will have a microwave-safe symbol on the bottom of them. However, it is important to keep in mind that they will still become very hot to the touch.

  1. I was also wondering this. Did you ever find out or am I going to be left guessing the size and burning the brownies?

      1. Yes, but it’ll affect the thickness of the batter so you may have to adjust the bake time.

  2. Hi, i have a lot of gerber jars from my baby.. I was wondering if I could use them.. And also I was worried about the glass to break at that temperature in the oven.. I have never made those of desserts and they look wonderful..
    Btw I am from Ecuador, I am following you since yesterday, today I made your chocolate chip cookies recipe with cream cheese with all your tips, the cookies were delicious and perfect shape!! Thank you!!

    1. Hi there! I’m not sure if that would work or if the glass is too thin to withstand the heat. I have never tried this recipe with baby food jars so I can’t say with certainty.

  3. if i seal them, how long will they be good???? I’d like to send my husband some. but shipping might take 2 to 3 weeks… please help!!!

    1. I use wide mouth pint jars for my desserts. Easier to get out off. I would think they would last at least a year if you use a hot lid on them.

  4. bingo! we’re so totally thinking alike. I love Ball jars. I have made pate’ in them for appetizer. I use them as water glasses (with sliced cucumber). And I use them for dessert during picnics (see my mango-coconut custard trifle with lime syrup…in a jar:

  5. Such a simple, elegant, and fun entertaining idea! Love the thought of using Mason/Ball jars. They’re relatively inexpensive, and give the recipe a rustic/chic look. Definitely making this recipe @ home!

  6. i need to find some jars so i can make these!

    and you’re totally onto something with that dessert idea :)