Table of Contents

The Mad Hatter’s Uncake: A Whimsical Peanut Butter Delight

My first encounter with this marvelously peculiar “Uncake” wasn’t in a kitchen, but on a whimiscal garden tea party, inspired by the tales of Alice in Wonderland. The host, a dear friend with a penchant for the delightfully absurd, presented a platter of what appeared to be dainty peanut butter and jelly sandwiches. But as I bit into one, a symphony of rich, nutty cake and bright berry jam exploded on my palate. It was an instant transport to a topsy-turvy tea party, where anything was possible, and every bite held a surprise.

Recipe Overview

Prep Time: 2 hours
Cook Time: 1 hour
Total Time: 3 hours
Servings: 16
Yield: 2 loaves of cake
Dietary Type: Vegetarian

Ingredients

Cake

1 tablespoon unsalted butter
3 tablespoons turbinado sugar (crystallized coarse raw)
3 cups all purpose flour
1 teaspoon baking powder
½ teaspoon baking soda
½ teaspoon salt
1 ¼ cups whole milk
2 teaspoons vanilla
1 ½ cups creamy peanut butter
½ cup unsalted butter (softened)
2 cups sugar
1 cup packed light brown sugar
6 eggs (room temperature)

Blackberry Jam Spread

3 cups unsweetened blackberries
½ cup sugar
1 tablespoon water
2 tablespoons cornstarch
1 teaspoon fresh lemon juice

Peanut Butter Frosting

⅓ cup creamy peanut butter
½ cup unsalted butter (softened)
3 cups sifted powdered sugar
¼ cup whole milk
2 teaspoons vanilla

Equipment Needed

9×5 inch bread loaf pans
Mixer (stand or hand mixer)
Whisk
Saucepan
Serrated knife
Cooling racks

Instructions

Position Oven Racks & Preheat: Lower oven racks to just below the middle. Preheat oven to 350 degrees Fahrenheit. This ensures even baking and prevents the tops from browning too quickly.
Prepare the Pans: Coat the inside of two 9×5 inch bread loaf pans with 1 tablespoon unsalted butter. Be thorough, reaching all corners and edges.
Sugar Coating: Generously shake the turbinado sugar onto the buttered surfaces of the pans. This adds a delightful crunchy texture to the crust of the cake.
Dry Ingredients: In a medium bowl, whisk together the all purpose flour, baking powder, baking soda, and salt. This ensures the leavening agents are evenly distributed, resulting in a light and airy cake. Set aside.
Wet Ingredients: In another bowl, combine the whole milk and vanilla. Set aside.
Cream Peanut Butter and Butter: In the bowl of a stand mixer (or using a hand mixer), cream together the creamy peanut butter and softened unsalted butter until really well mixed and smooth.
Add Sugars: Gradually add the white sugar and light brown sugar to the peanut butter mixture and beat well until very light and fluffy. “Beat the hell out of it,” as my grandmother used to say! This incorporates air, creating a lighter crumb.
Incorporate Eggs: Add one egg at a time, beating well after each addition until very light. Ensure the eggs are at room temperature; this helps them emulsify properly into the batter.
Alternate Wet and Dry Ingredients: Add 1/3 of the flour mixture to the batter at low speed. Beat well until just combined. Be careful not to overmix.
Add 1/3 of the milk mixture and beat well. Repeat this process with the remaining flour and milk, alternating until everything is incorporated.
Divide Batter: Divide the batter evenly between the two prepared loaf pans.
Bake: Space the pans evenly between each other and the sides of the oven. Bake for 50 minutes.
Check for Browning & Tent (if necessary): Sprinkle tops of cakes with raw sugar. If the edges are browning too quickly, cover the cakes with aluminum foil without touching the top of the cake (“tent” them). Do this outside of the oven to preserve the oven’s heat.
Final Bake: Replace cakes in oven for 10 to 15 minutes more, only until a toothpick inserted into the center comes out clean. This indicates the cake is fully baked.
Cool in Pans: Cool on a rack for 20 minutes. This allows the cake to set slightly before removing it from the pans.
Remove from Pans: Overturn the cakes onto cooling racks until cooled completely.
Prepare Blackberry Jam: Combine the blackberries, sugar, and water in a saucepan over medium-low heat.
Simmer: Simmer for about 20 minutes, until the berries get really juicy and have broken down.
Cornstarch Slurry: Remove 2 tablespoons of juice only from the mixture and set aside to cool. You can use cracked ice to cool the bowl quickly. Whisk the cornstarch into the cooled juice. It’s crucial that the juice is cooled entirely before adding the cornstarch to prevent clumping.
Thicken Jam: Whisk the cornstarch slurry back into the berry mixture and return the heat to medium-low. When thickened bubbles are visible, remove from heat.
Add Lemon Juice: Stir in the lemon juice. This brightens the flavor and balances the sweetness.
Chill Jam: Cover and put the jam in the refrigerator for at least 30 minutes to allow it to thicken further.
Make Peanut Butter Frosting: Beat the peanut butter and softened butter on high speed until well incorporated, light, and fluffy.
Add Powdered Sugar: Gradually add in all the powdered sugar with the mixer on very low speed. This prevents a powdered sugar cloud from exploding.
Adjust Consistency: Add milk slowly until the mixture reaches the right consistency – smooth, creamy, and spreadable.
Add Vanilla: Add the vanilla and mix until creamy.
Assemble the “Uncake”: Cut off the ends of the cake loaves with a serrated knife to create a neat edge.
Slice: Cut slices of cake to your desired thickness, typically about 1/2 inch to 3/4 inch thick.
Frost: Apply at most 3 tablespoons of peanut butter frosting to each slice. Do not spread too much; keep it light and fluffy.
Jam: Add at most 1 tablespoon of blackberry jam on top of the peanut butter frosting.
Sandwich: Place a second slice of cake on top and press lightly to create the “Uncake” sandwich.

Expert Tips & Tricks

Room Temperature is Key: Ensure that the butter, eggs, and milk are at room temperature for optimal emulsification and a smooth batter.
Don’t Overmix: Overmixing the batter develops gluten, resulting in a tough cake. Mix until just combined.
Adjust Sweetness: If you prefer a less sweet cake, reduce the sugar by 1/4 cup.
Jam Consistency: If the blackberry jam is too thick, add a tablespoon or two of water to thin it out.
Frosting Stability: To stabilize the frosting for warmer temperatures, add a tablespoon of meringue powder.

Serving & Storage Suggestions

Serve the Mad Hatter’s Uncake immediately after assembly for the best texture and flavor. The assembled cakes are best enjoyed fresh.

Storage: Store any leftover cake slices separately from the jam and frosting. The cake can be stored in an airtight container at room temperature for up to 2 days or in the refrigerator for up to 5 days. The blackberry jam can be stored in an airtight container in the refrigerator for up to a week. The peanut butter frosting is best stored in the refrigerator in an airtight container and used within 3-4 days.
Reheating: The cake doesn’t need to be reheated. Serve at room temperature. If refrigerated, let it sit at room temperature for 15-20 minutes before serving.
Freezing: The cake loaves can be frozen (before frosting and jam) for up to 2 months. Wrap them tightly in plastic wrap and then in foil. Thaw overnight in the refrigerator before assembling. The frosting can also be frozen, but its texture may change slightly upon thawing.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	344 kcal	17%
Total Fat	17.7 g	27%
Saturated Fat	5.9 g	30%
Cholesterol	57 mg	19%
Sodium	157 mg	7%
Total Carbohydrate	47.8 g	16%
Dietary Fiber	1.9 g	8%
Sugars	36 g	–
Protein	6.7 g	13%

Note: Nutritional information is an estimate and can vary based on specific ingredients and portion sizes.

Variations & Substitutions

Gluten-Free: Substitute a gluten-free all-purpose flour blend for the regular flour.
Dairy-Free: Use a plant-based milk alternative like almond milk or soy milk in place of whole milk. Use a plant-based butter substitute.
Different Jams: Experiment with different flavors of jam, such as strawberry, raspberry, or apricot.
Nut-Free: Substitute sunflower seed butter (sunbutter) for the peanut butter.
Chocolate Peanut Butter: Add 1/4 cup of cocoa powder to the dry ingredients for a chocolate peanut butter cake.

FAQs (Frequently Asked Questions)

Q: Can I make the cake ahead of time?
A: Yes, the cake can be baked a day or two in advance. Wrap it tightly in plastic wrap and store it at room temperature.

Q: Can I use a different type of sugar for the turbinado sugar?
A: Turbinado sugar adds a unique crunch, but you can substitute with coarse sanding sugar if needed.

Q: How do I prevent the bottom of the cake from getting too dark?
A: Place a baking sheet on the rack below the cake pans to deflect some of the heat.

Q: Can I freeze the assembled “Uncake”?
A: It’s best to freeze the cake loaves separately before frosting and adding the jam. Assembled, the texture may suffer after thawing.

Q: What if my frosting is too thick?
A: Add milk 1 teaspoon at a time until you reach the desired consistency.

Final Thoughts

The Mad Hatter’s Uncake is more than just a recipe; it’s an invitation to embrace whimsy and creativity in the kitchen. Whether you’re hosting a tea party or simply seeking a delightfully different dessert, this peanut butter and blackberry creation is sure to charm. Don’t be afraid to experiment with different jams, frostings, or cake flavors to create your own unique version. Embrace the madness, and most importantly, enjoy the process!

The Mad Hatter’s Uncake Recipe