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Banana walnut cake with mascarpone frosting
Soft, nutty banana cake with mascarpone cream

Banana Walnut Cake with Mascarpone Frosting

Author: Flavelo
Recipes Cakes and Desserts
The secret to banana cakes lies in the fruit's structure: fibers and sugar content naturally keep the crumb moist for days. Walnut oiliness enhances this, adding crunch. This cake is where rustic baking meets elegant pastry: a dense, substantial base crowned with light, creamy mascarpone frosting.
🕒 Prep Time 30 mins
🍳 Cook Time 40 mins
⌛ Total Time 2 hrs 20 mins
🍽️ Servings 10 servings
🔥 Calories 480 kcal
🌍 Cuisine International

Ingredients

Equipment Needed

  • 9-inch Springform pan
  • Mixer
  • Sifter
  • Wire rack

Allergen Information

⚠️ Wheat
⚠️ Milk
⚠️ Egg
⚠️ Tree Nuts

Instructions

1 ✓

Preheat oven to 350°F (180°C). Butter a 9-inch springform pan and line bottom with parchment.

Tip: Parchment ensures perfect release.
2 ✓

Mix dry ingredients: flour, baking powder, baking soda, cinnamon, salt, and ground walnuts.

Tip: Even distribution of leavening agents prevents bitter spots.
3 ✓

Mash bananas with a fork until smooth.

Tip: The browner the banana, the sweeter the cake.
4 ✓

Beat eggs with sugars and vanilla until pale and voluminous (4-5 mins).

Tip: Sugar crystals cut into egg whites, creating air bubbles for lift.
5 ✓

Stream in oil, then milk, then fold in banana mash.

Tip: Add oil slowly to maintain emulsion.
6 ✓

Fold in dry ingredients in batches. Stop as soon as flour disappears.

Tip: Do not overwork the gluten!
7 ✓

Bake 35-40 minutes until toothpick comes out dry.

Tip: Don't open the oven early, or it may collapse.
8 ✓

Cool 10 mins in pan, then fully on a rack.

Tip: Hot cake is fragile.
9 ✓

Frosting: Whip cold cream to stiff peaks. Mix mascarpone with powdered sugar, then fold in whipped cream.

Tip: Cream only whips when cold.
10 ✓

Frost the cooled cake.

Tip: If cake is warm, frosting will slide off.
11 ✓

Garnish with banana slices tossed in lemon juice and chopped walnuts.

Tip: Lemon juice prevents browning.

Recipe FAQ

Why is the cake heavy?
Likely overmixed after adding flour. This develops gluten, making it tough.
Top is burning, inside is raw.
Cover with foil halfway through baking and lower the heat slightly.
Runny frosting?
Overmixed mascarpone or warm cream. Keep everything cold!

Ingredients

  • 2 cups All-Purpose Flour (sifted)
  • 1 cup Ground Walnuts
  • 3/4 cup Granulated Sugar
  • 1/4 cup Packed Brown Sugar
  • 1 packet Baking Powder (approx. 2.5 tsp)
  • 1 tsp Baking Soda
  • 1 tsp Ground Cinnamon
  • 1 pinch Salt
  • 3 medium Eggs
  • 2 whole Ripe Bananas
  • 1/2 cup Vegetable Oil
  • 1 tbsp Vanilla Sugar (or 1 tsp Extract)
  • 1/2 cup Milk
  • 2/3 cup Powdered Sugar
  • 3/4 cup Heavy Cream (cold)
  • 8 oz Mascarpone Cheese (cold)
  • 1/2 cup Chopped Walnuts (for garnish)
  • 1 tbsp Butter (for pan)
  • 1 tsp Lemon Juice