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Peanut Butter Cups (Cake) in a Jar

By Ole & Shaina Olmanson |

I’ve been a bit obsessed with peanut butter and chocolate. It’s like Jenny came and invaded my brain. Everything from ice cream to cookies to cupcakes. I want that silky peanut butter to stand up to good, strong chocolate and melt together to become something wonderful. So into the devil’s food batter went the peanut butter, baked into a cake in a jar and then topped with dark chocolate. Perfectly portable for your spring picnic.

Peanut Butter Cups in Cake in a Jar

12 pint-sized canning jars with lids
canola oil spray
8 ounces peanut butter
1 1/2 cups powdered sugar
1 recipe Devil’s food cupcakes or cake mix
8-10 ounces dark chocolate

Preheat oven to 350 degrees F. Spray the inside of the canning jars with the canola oil. Mix together powdered sugar and peanut butter until smooth. Roll into 1.5-2″ balls. Scoop 3-4 tablespoons of cake batter into the bottom of each jar using a large scoop. Place a peanut butter ball into the center of each jar and add an additional 2-3 tablespoons of batter. Wipe up any batter that hit the outside of the jar or around the rim.

Bake at 350 degrees on a baking sheet for 15-20 minutes or until tops spring back when touched. Remove from oven. Immediately place 1/2 ounce of chocolate on top of the hot cake. Seal with ring and lid and wait for them to pop. Using a towel, pick up the jar and turn to coat the entire top of the cake with chocolate. Store in the fridge for up to a week.

Makes 12 cupcakes in a jar.

For even more recipes in a jar, check out “Contain Yourself! 15 beyond-exciting desserts in a jar!

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About Ole & Shaina Olmanson


Ole & Shaina Olmanson

Shaina Olmanson is the food writer and home cook behind Food for My Family. Shaina can usually be found in one of three places: cooking, at the computer or behind the camera. These three things occur in the kitchen simultaneously with her four children hanging from her apron strings as she teaches them to cook and the importance of eating locally, seasonally, organically and together. She is a former Babble Food blogger.

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30 thoughts on “Peanut Butter Cups (Cake) in a Jar

  1. DessertForTwo says:

    How cute!! Thanks for sharing :)

  2. Jessica says:

    These look so yummy! We adore the chocolate peanut butter combination too, and I love that they are individual so I can store them separately! Thanks for a new idea!


  3. candy perri says:

    awesome idea!!!!!

  4. TidyMom says:

    oh my family would LOOOOVE these!!

  5. Cookbook Queen says:

    I’m assuming that a few of these are in the mail and on their way to my house.

    And by a few, I mean like twenty.

  6. Amber | Bluebonnets & Brownies says:

    Please can I have this for breakfast? It might just kill my headache and make me happy again.

  7. Hannah at FleurDeLicious says:

    These look ridiculously amazing. I have no upcoming occasions that call for portable cake in a jar, but I might make these and force us to go eat them in the car, just because. I love how perfectly smooth they look on top!

  8. WenDee Riffe says:

    i soooo love this idea~~~my son and husband love the combo and like a commenter mentioned–for storage and freezing this is great!!!


  9. Bonnie Banters says:

    Oh, I just love this. Especially the idea of taking on a picnic…those concerts on the green on the town square, etc. Another recipe for my son-in-law incorporating peanut butter and chocolate. Very innovative!

  10. Amanda says:

    Seriously. I think you just made my life.

  11. Jen B says:

    Oh my goodness, I think I need to go find canning jars tonight! :) Yum.

  12. Katrina says:

    I love everything about these.

  13. Kristen says:

    These look pretty darn tasty!

  14. Tracy says:

    So fun! I bet my peanut butter-loving hubby would love these!

  15. Maris (In Good Taste) says:

    What a cute and delicious idea!

  16. Wenderly says:


  17. Robyn | Add a Pinch says:

    Golly pete! These look to die for, Shaina! YUM!

  18. Jamie | My Baking Addiction says:

    These are absolute perfection, Shaina!

  19. Brenda @ a farmgirl's dabbles says:

    Very fun! My family would love these. I especially like the dark chocolate with the PB.

  20. Tickled Red says:

    Nuh unh! Are you kidding me!? Those are now coming to live at my house. I’m a chocolate-peanut butter nut :)

  21. Mamahartt says:

    Cupcakes in a jar make wonderful additions to care packages for deployed troops too. They seal tightly and travel well. A separate container of frosting in the box allows for them to be frosted when they are eaten and stay fresher in the meantime.

  22. Karen says:

    IMPORTANT! When you’re filling the jars, 1/2 full is MORE than enough! I filled some of mine about 1/2 and some a little more than half, and all of them are above the rim right now (oh darn, I’ll have to eat a bit to put the chocolate on). :)

  23. Georgia says:

    Hi there – I’m planning on making this cake in a jar to send to a friend overseas. I just have a question first – Did you use baker’s chocolate for the dark chocolate topping, or just any kind of plain dark chocolate?

  24. Greg Allen says:

    I don’t understand this:

    “Seal with ring and lid and wait for them to pop”

    Do they mean, screw on the lid and then let the increasing pressure pop off the top? Wouldn’t that risk breaking the jar and maybe even be dangerous?

  25. Heather w says:

    @Greg Allen,
    Canning jars have a lid that makes a poping sound when they are sealed.
    If u have ever pushed down on a jar that u bought from the grocery store (ie. Pickles) and noticed how it will push down it will pop back.
    That is what makes the jars seal. When the item in the jar is hot it pulls the lid down and seals it. That is what the pop is..

    Love these, they are GREAT!!!!!

  26. tricia lauletta says:

    my nephew made these for christmas we all loved them. It reminds me of a funny bone snack cakes

  27. SoNice says:

    Hi.. I was wondering.. Could i do this recipe without canning jars? with some normal glass jars? I’m from Malaysia.. and it’s hard finding canning jars. thank you

  28. Stephanie Bunch says:

    I also want to know which kind of dark chocolate u used. Also, can u turn out the cakes when finished? Or do I have to send out the jars?

  29. Marsha says:

    Can’t wait to make these for my grandchildren!! Thanks!,,

  30. Cindy Thornlow says:

    Every year we celebrate our two sons born on the 7th of July (3 years apart) with my husband born on the 12th, so I have to make a Chocolate Cherry cake for one, a Peanut Butter cake for the other and plain ol’ homesteaders cake for the husband. This year the oldest boy said, “mom couldn’t you just combined this idea into a peanut butter with chocolate cake so it taste more like a Reeses?” Well duh, now this looks like it will fill the bill perfectly, and I don’t have to make 3 cakes!!! Course we have lots of family over to help eat them all up, but I sure like the idea of having all these in jars and then people could pick out their favorites. The chocolate/cherry would work just the same.

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