Molten Butterscotch Rum Cakes with Graham Cracker Crust

Prep: 15 minCook: 16 min1 cake (3 slices)mediumAmerican
Molten Butterscotch Rum Cakes with Graham Cracker Crust

Warm individual cakes with molten butterscotch centers and a hint of rum, baked in graham cracker-lined custard cups. The rich butterscotch and butter mixture creates a flowing center when the cake is inverted, while the graham cracker crumbs add subtle sweetness and texture. Perfect for intimate dinners or special occasions when you want an impressive dessert that serves just three. The key is precise timing to achieve the signature molten center while keeping the edges set.

Ingredients

Yield: 1 cake (3 slices)
  • 1 tablespoon graham cracker crumbs
  • ½ cup butterscotch chips
    coconut oil1:1dairy-freedairy-free

    solidify first then melt

    Full guide →
  • cup butter or margarine
    coconut oil1:1dairy-freedairy-free

    solidify first then melt

    Full guide →
  • 2 whole eggs
  • 1 egg yolk
  • ¼ teaspoon rum extract
    vanilla extract1:1alcohol-free

    milder flavor

  • cup brown sugar, packed
    coconut sugar1:1refined-sugar-free

    similar molasses notes

    Full guide →
  • cup all-purpose flour

Instructions

  1. 1

    Heat oven to 400°F and spray custard cups with baking spray

  2. 2

    Sprinkle graham cracker crumbs in each cup

  3. 3

    Melt butterscotch chips and butter in saucepan over medium heat, stirring constantly

  4. 4

    Remove from heat and cool for 5 minutes

  5. 5

    Beat eggs, egg yolk, and rum extract in large bowl until blended

  6. 6

    Beat in brown sugar, then melted butterscotch mixture and flour

  7. 7

    Divide batter evenly among prepared custard cups

  8. 8

    Place cups on cookie sheet and bake 13 to 16 minutes until sides are set but centers remain soft

  9. 9

    Let stand 5 minutes, then run knife around edges

  10. 10

    Invert onto dessert plates immediately and remove cups

Tips

Tip 1

Watch timing carefully as overcooking will eliminate the molten center effect

Tip 2

Cool the butterscotch mixture slightly before adding to eggs to prevent curdling

Tip 3

Test doneness by gently shaking cups - centers should jiggle slightly while edges are firm

Good to Know

Storage

Refrigerate covered up to 2 days, reheat in microwave 30-45 seconds

Make Ahead

Mix batter up to 4 hours ahead, refrigerate, then bake when ready to serve

Serve With

Serve immediately while warm for best molten texture, optionally with vanilla ice cream

See pairing guide →

Common Mistakes

Watch

Use room temperature eggs to prevent butterscotch mixture from seizing

Watch

Don't overbake or centers will set completely

Watch

Invert immediately after resting or cakes may stick to cups

Substitutions

Dairy-Free Swaps

butter
coconut oil1:1dairy-freedairy-free

solidify first then melt

Full guide →

General Alternatives

rum extract
vanilla extract1:1alcohol-free

milder flavor

Full guide →
brown sugar
coconut sugar1:1refined-sugar-free

similar molasses notes

Full guide →
Find more substitutions →

FAQ

Can I make these ahead of time?

Mix the batter up to 4 hours ahead and refrigerate. Bake just before serving for the best molten texture, as reheated cakes lose their flowing centers.

What if I don't have custard cups?

Use ramekins or muffin cups of similar size. Adjust baking time slightly if using different sized containers, watching for set edges and soft centers.

How long will leftovers keep?

Store covered in refrigerator up to 2 days. Reheat in microwave for 30-45 seconds, though reheated cakes won't have the same molten consistency.