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Rum Cake in a Jar: A Taste of Paradise, Perfectly Portioned

The first time I encountered rum cake was at a potluck, a kaleidoscope of dishes stretching across picnic tables. But one humble cake, glistening with a boozy glaze, stole the show. Each bite was an explosion of sweet, buttery flavor, laced with the unmistakable warmth of rum. It tasted like sunshine and celebration, a little slice of the Caribbean right there in suburban Ohio. Now, I’ve taken that iconic flavor and shrunk it down into adorable, portable jars – perfect for gifting or a personal indulgence.

Recipe Overview

Prep Time: 15 minutes
Cook Time: 45 minutes
Total Time: 60 minutes
Yields: 6 jars
Dietary Type: Not Gluten-Free

Ingredients

1 (18 ounce) box yellow cake mix
1 (3 1/2 ounce) box instant vanilla pudding
4 eggs
1 cup oil (vegetable or canola oil recommended)
1/2 cup water
3/4 cup rum (dark or light rum both work well)

Equipment Needed

Large Mixing Bowl
Whisk
Electric Mixer
Six (1 pint) Wide-Mouthed Canning Jars
Baking Sheet
Toothpick
Hot, Sterilized Canning Seals and Rings

Instructions

Preheat your oven to 325°F (160°C). Make sure your oven rack is positioned in the center.
In a large mixing bowl, combine the yellow cake mix and the instant vanilla pudding. Use a whisk to thoroughly blend the two dry ingredients together, ensuring there are no lumps. This will help distribute the pudding evenly throughout the batter.
Add the eggs, oil, water, and rum to the bowl with the cake mix and pudding.
Using an electric mixer, beat the ingredients together for 2 minutes. Start on low speed to prevent splattering, then increase to medium speed until the batter is smooth and well combined. Don’t overmix! Overmixing can lead to a tough cake.
Grease each of the six one-pint wide-mouthed canning jars very well. You can use cooking spray or shortening. Ensure you reach all the way down to the bottom and around the sides to prevent the cakes from sticking.
Carefully pour approximately one scant cup of batter into each prepared jar. Be careful not to overfill the jars, as the batter will rise during baking. Leave about an inch of headspace at the top.
Wipe any stray batter from the rims of the jars using a clean, damp cloth. This is crucial for ensuring a good seal if you plan on canning these cakes for longer storage.
Place the filled jars on a baking sheet. This makes it easier to transfer them in and out of the oven, and also helps to distribute the heat evenly.
Bake in the preheated oven at 325°F (160°C) for 45 minutes, or until a toothpick inserted into the center of a cake comes out clean. If the tops of the cakes are browning too quickly, you can loosely tent the baking sheet with aluminum foil.
Remove the jars from the oven and immediately wipe the rims of each jar again with a clean, damp cloth. This will remove any crumbs or debris that may have accumulated during baking.
Carefully place a hot, sterilized canning seal on top of each jar, followed by a canning ring. Screw the rings on finger-tight – not too tight, as air needs to escape during the cooling process.
To ensure the jars seal properly for longer-term unrefrigerated storage (optional), you’ll need to process them in a boiling water bath. However, this is not strictly necessary if you plan to refrigerate the cakes and eat them within a week or two. If processing, carefully lower the jars into a boiling water bath, ensuring they are completely submerged by at least an inch of water. Boil for 10 minutes, then turn off the heat and let the jars sit in the hot water for another 5 minutes before removing them.
Let the jars cool completely on a wire rack. As they cool, you should hear a “popping” sound as the seals are drawn down, indicating that a vacuum seal has been formed.
If any of the jars don’t seal properly (the lid doesn’t appear concave, or you can press down on the center of the lid and it pops back up), store those jars in the refrigerator and consume within a week or two.

Expert Tips & Tricks

For an even more intense rum flavor: After baking and while the cakes are still warm, poke holes in the tops with a skewer and drizzle with a mixture of rum and melted butter.
Don’t have vanilla pudding? Butterscotch or even cheesecake-flavored pudding mix works beautifully as a substitute.
Greasing the jars: Use shortening or butter instead of cooking spray for a richer flavor and better release.
Preventing sticking: Place a small circle of parchment paper at the bottom of each jar before filling with batter for extra insurance against sticking.
Sealing Jars: When placing the seals and rings, make sure the seal is perfectly centered on the jar. A crooked seal can prevent it from sealing properly.

Serving & Storage Suggestions

These Rum Cakes in a Jar are delightful served warm or at room temperature. A dollop of whipped cream or a scoop of vanilla ice cream elevates them to a truly decadent dessert.

If the jars are properly sealed through the boiling water bath process, they can be stored at room temperature in a cool, dark place for up to a year. Once opened, or if not sealed, they should be stored in the refrigerator for up to two weeks.

You can also freeze these cakes for longer storage. Allow them to cool completely, then wrap them tightly in plastic wrap and place them in a freezer bag. They can be frozen for up to three months. To thaw, transfer to the refrigerator overnight.

Nutritional Information

(Estimated, per jar)

Nutrient	Amount per Serving	% Daily Value
Calories	863 kcal	N/A
Calories from Fat	446 kcal	N/A
Total Fat	49.6 g	76%
Saturated Fat	7.3 g	36%
Cholesterol	142.7 mg	47%
Sodium	837.3 mg	34%
Total Carbohydrate	81.6 g	27%
Dietary Fiber	0.9 g	3%
Sugars	52 g	N/A
Protein	7.9 g	15%

Note: Nutritional information is an estimate and may vary based on specific ingredients used.

Variations & Substitutions

Spice it up: Add a teaspoon of ground cinnamon or nutmeg to the batter for a warm, spiced rum cake.
Tropical twist: Replace half of the rum with coconut rum and add shredded coconut to the batter.
Citrus zing: Add the zest of an orange or lime to the batter for a bright, citrusy flavor.
Nutty delight: Fold in chopped pecans or walnuts for added texture and flavor.
Booze-Free: Substitute rum extract or rum flavoring for the actual rum. You might also try a combination of pineapple juice and a touch of vanilla extract to mimic the rum flavor.

FAQs (Frequently Asked Questions)

Q: Do I have to use rum?
A: No, you can substitute rum extract for a non-alcoholic version or experiment with other liquors like bourbon or brandy for a different flavor profile.

Q: How do I know if the jars are sealed properly?
A: After cooling, the lid should be slightly concave and shouldn’t flex when you press down on the center. If the lid pops up and down, the jar isn’t sealed and should be refrigerated.

Q: Can I use regular cake mix instead of yellow cake mix?
A: Yes, you can use other flavors like white cake mix or even spice cake mix for a different twist. Adjust the pudding flavor accordingly for a cohesive taste.

Q: Can I double the recipe?
A: Yes, you can easily double (or even triple) the recipe, just make sure you have enough jars and a large enough mixing bowl.

Q: Why is it important to wipe the rims of the jars?
A: Wiping the rims ensures a clean surface for the lids to seal properly, preventing spoilage and ensuring a longer shelf life.

Final Thoughts

These Rum Cakes in a Jar are more than just a dessert; they’re a little edible hug, perfect for sharing with loved ones or savoring all by yourself. Whether you’re gifting them to a new neighbor or simply treating yourself to a taste of paradise, I encourage you to give this recipe a try. Don’t be afraid to experiment with different flavors and variations to create your own signature Rum Cake in a Jar. And most importantly, enjoy the process! Let me know how yours turn out – I’d love to hear your feedback and creative twists! Perhaps you’ll want to pair it with a dark roast coffee or a scoop of coconut ice cream for an even more decadent treat. Happy baking!

Rum Cake in a Jar Recipe