These are freakin’ adorable. I found them on a blog, also they are NOT created by me! Simply reblogging them for future use.
For even more recipes in jar check out “Contain Yourself! 15 beyond-exciting desserts in jar!“

Rainbow Cake in Jar
- 1 box white cake mix made according to package instructions
- Neon food coloring in pink, yellow, green, turquoise, and purple
- 3 one-pint canning jars
- 1 can vanilla frosting
- Rainbow sprinkles
Preheat oven to 350 degrees. Thoroughly wash and dry the inside of each canning jar. Spray the inside of each jar thoroughly with nonstick cooking spray. Set aside.
Scoop about 1/2 cups of cake batter into five small bowls. It doesn’t have to be perfect, don’t panic if you get a little more of less of one color than another. Tint each bowl of cake batter with the food coloring until very vibrant.
Spoon about 3 tablespoons of the purple batter into the bottom of each jar. Spoon equal amounts of turquoise batter, then green, yellow, and pink. Place the jars in a shallow baking dish, add about 1/4″ in water in the baking dish. Place the baking dish in the oven and bake for 30-35 minutes.
Remove jars and allow to cool completely before scooping a small portion from the top of your cake and adding a hefty dollop of vanilla buttercream to the top. Sprinkle & serve, or cover with a lid and store in the fridge or pop into the mail & surprise someone you love!
POST EDIT: Several commenters have indicated that the cake is not cooking all the way through in the 30-35 minutes indicated in the recipe. This was enough time for our cake, but I’m cooking at high altitudes, and my oven tends to bake hot. So, I’d recommend baking the cake for 40 minutes, then return it to the oven if it still doesn’t spring back to the touch when you check to see if it’s finished. As for the cake puffing up and out of it’s bottle, ours did that a bit, as well. Easy fix. We just scooped a bit of the cake out to make room for the frosting and wiped the outside of our jars clean. Several people have indicated that the wide-mouthed mason jars work a little better for this purpose. I’ve not yet baked with wide-mouthed. What you see above is what was baked in my kitchen according to the recipe instructions, and what came out of the oven when it was all. Of course, if you’re feeling wildly impatient, you can also zap the cake in the microwave for 2 minutes. It’s going to bubble up, for sure, but you can scoop the top part of that cake out, frost it, and no one will ever be the wiser. Good luck, everyone! This is such a fun cake. My kids went nuts over it, and I hope it works as beautifully for you as it did for us!

Red Velvet Nutella Cake-in-a-Jar
- 1 box chocolate cake mix, prepared according to package directions
- 1 teaspoon red food coloring
- 1/2 cup Nutella
- 1 jar cream cheese frosting
- 3 pint-sized canning jars
Thoroughly wash and dry the inside of each canning jar. Spray the inside of each jar thoroughly with nonstick cooking spray. Set aside.
Stir the red food coloring into the prepared cake batter. Spoon about 1 cup of cake batter into each jar. Cook one jar at a time in the microwave for 1-2 minutes, or until the cake is cooked through. Allow jars to cool slightly, then scoop the top half of cake from the jar. Spoon a tablespoon or so of Nutella into the center of the jar, top with a dollop of cream cheese frosting, then replace the top half of the cake back in the jar, add another layer of Nutella, then enough frosting to fill the rest of the jar.
Serve immediately or cover with a lid and store in the fridge or pop into the mail & surprise someone you love! Cakes should stay fresh in the fridge for up to 5 days, and can be mailed so long as they are topped with a canning jar lid and arrive at their final destination within 3 days.

Pinkalicious Cake-In-A-Jar
- 1 box strawberry cake mix, prepared according to package directions
- 1 jar strawberry frosting
- 3 pint-sized canning jars
- Pink sprinkles
Thoroughly wash and dry the inside of each canning jar. Spray the inside of each jar thoroughly with nonstick cooking spray. Set aside.
Spoon about 1 cup of cake batter into each jar. Cook one jar at a time in the microwave for 1-2 minutes, or until the cake is cooked through. Allow jars to cool slightly, then scoop the top half of cake from the jar. Plop a dollop of frosting into the center of the jar, then replace the top half of the cake back in the jar. Add enough frosting to fill the rest of the jar. Finish off with pink sprinkles.
Serve immediately or cover with a lid and store in the fridge or pop into the mail & surprise someone you love! Cakes should stay fresh in the fridge for up to 5 days, and can be mailed so long as they are topped with a canning jar lid and arrive at their final destination within 3 days.

Neapolitan Cakes in a Jar
24 8-ounce canning jars
chocolate cake batter
strawberry cake batter (I used a pink lady cake)
vanilla cake batter
chocolate buttercream
vanilla buttercream
strawberry buttercream
Preheat oven to 350 degrees F. Spray the inside of the canning jars with canola oil. Scoop 2 tablespoons of each flavor cake batter into the jars one at a time to create layers. Bake at 350 degrees F for 15-20 minutes or until center of the cake springs back when touched. Remove from oven and top with rings and lids. The jars will pop and seal as the cakes cool. Store in the fridge until ready to serve.
To frost I used Katie’s technique for two-tone frosting, place all three frostings in three different piping bags. Cut the tips off and then place the three bags into one larger bag fitted with a large-sized tip. Then pipe frosting onto cakes before serving.
Makes 24 cupcakes when you use approximately 1/2 the cake batter for each of the 3 cakes flavors.

Peanut Butter Cups in Cake in a Jar
12 8-ounce 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!“

Chocolate Pudding Cake in a Jar
Cake:
1 cup (250 mL) all-purpose flour
1/2 cup (125 mL) sugar
1/4 cup (60 mL) cocoa
2 tsp. (10 mL) baking powder
1/4 tsp. (1 mL) salt
1/2 cup (125 mL) milk
1/4 cup (60 mL) canola oil or melted butter
1 tsp. (5 mL) vanilla
Topping:
1/2 cup (125 mL) packed brown sugar
1/4 cup (60 mL) cocoa
Preheat the oven to 350°F. Spray 6 jars or ramekins with nonstick spray.
In a medium bowl, stir together the flour, sugar, cocoa, baking powder and salt. Add the milk, oil and vanilla and stir until smooth. Divide the batter between the jars or ramekins, spreading it into the bottom.
To make the topping, stir together the sugar and cocoa and sprinkle it over the batter, dividing it between the jars. Pour about 3 Tbsp. of boiling water over each (I find this easiest by pouring boiling water from a kettle into a 1/4 cup measure, filling it about 3/4 full, then pouring it overtop of each cake), but don’t stir them! Place the pudding cakes on a baking sheet and bake for 30-35 minutes, until they appear done and the sauce is bubbly. Serve warm, preferably with vanilla ice cream or whipped cream. Serves 6.