Table of Contents

Orange Walnut Bar Cake: A Slice of Sunshine

There’s something inherently comforting about the scent of citrus baking in the oven. For me, it always takes me back to my grandmother’s kitchen. She wasn’t a fancy baker, but her simple cakes, especially the ones bursting with orange zest and crunchy walnuts, were legendary. I remember standing on a stool, mesmerized as she grated the orange peel, the fragrant oils filling the air. This Orange Walnut Bar Cake is a tribute to those memories, a slice of sunshine infused with love and a touch of nostalgia. It’s more than just a cake; it’s a warm hug in every bite.

Recipe Overview

Prep Time: 20 minutes
Cook Time: 50 minutes
Total Time: 1 hour 10 minutes
Servings: 8
Yield: 1 loaf cake
Dietary Type: Vegetarian

Ingredients

For the Cake:
- 125g unsalted butter, softened
- ¾ cup caster sugar
- 1 orange, rind finely grated
- 1 lemon, rind finely grated
- 2 large eggs
- 1 ½ cups self-raising flour
- ½ cup walnut pieces
- ½ cup orange juice
- 3 tablespoons milk
- 2 teaspoons sugar
For the Orange Butter Frosting:
- 75g unsalted butter, softened
- 250g icing sugar, sifted
- 1 orange, rind finely grated
- ¼ cup orange juice

Equipment Needed

Loaf tin or square cake tin
Baking paper
Mixing bowls
Electric mixer
Sifter
Wire rack

Instructions

Preheat your oven to 180 degrees C (350 degrees F). It’s crucial that the oven is properly preheated to ensure even baking.
Grease a loaf tin or square cake tin generously with some butter. Then, line the base with baking paper. This prevents the cake from sticking and makes it easy to remove once baked.
In a large mixing bowl, cream together the softened butter, caster sugar, orange rind, and lemon rind until the mixture is light and fluffy. This step is essential for incorporating air into the batter, resulting in a tender crumb. Use an electric mixer for best results, but you can also do it by hand.
Add the eggs one at a time, beating well after each addition. Make sure each egg is fully incorporated before adding the next to prevent the batter from curdling.
Gently fold through the sifted self-raising flour. Sifting the flour removes any lumps and aerates it, contributing to a lighter texture. Be careful not to overmix at this stage, as it can develop the gluten in the flour, resulting in a tough cake.
Stir in the walnut pieces, followed by the orange juice, and then the milk. Ensure everything is well combined, but again, avoid overmixing. The walnuts should be evenly distributed throughout the batter.
Pour the batter into the prepared tin and sprinkle evenly with the 2 teaspoons of sugar. The sugar will caramelize during baking, creating a lovely crust on top of the cake.
Bake for about 50 minutes. To test for doneness, insert a wooden skewer or toothpick into the center of the cake. If it comes out clean or with just a few moist crumbs attached, the cake is ready. If the skewer comes out with wet batter, bake for a few more minutes and test again.
Let the cake stand in the tin for a few minutes before turning it out onto a wire rack to cool completely. This prevents the cake from breaking apart while it’s still warm and fragile.
To make the Orange Butter Frosting, cream the softened butter in a small mixing bowl until light and fluffy. This will be the base of your frosting, so make sure it’s smooth and well-aerated.
Beat in the sifted icing sugar gradually, ensuring it’s fully incorporated before adding more. Sifting the icing sugar prevents lumps and creates a smooth, silky frosting.
Add the orange rind and orange juice, then beat at high speed with an electric mixer for a few minutes until the frosting is stiff enough to shape easily but not too stiff to spread. You want a consistency that holds its shape but is still pliable.
If the frosting is too thin, add more sifted icing sugar a tablespoon at a time, until you reach the desired consistency. If it’s too thick, add a little more orange juice (or even water) until it becomes spreadable.
Once the cake has cooled completely, frost generously with the prepared Orange Butter Frosting. You can use a spatula or a piping bag for a more decorative finish.

Expert Tips & Tricks

Toast the walnuts before adding them to the batter to enhance their flavor and add a delightful crunch. Simply spread them on a baking sheet and toast in a preheated oven at 180 degrees C (350 degrees F) for 5-7 minutes, or until fragrant.
For a more intense orange flavor, you can add a teaspoon of orange extract to the batter along with the orange juice.
If you don’t have self-raising flour, you can make your own by combining 1 ½ cups plain flour with 2 ¼ teaspoons baking powder and ¾ teaspoon salt.
To prevent the cake from browning too quickly, you can tent it loosely with foil during the last 15-20 minutes of baking.
If your butter is not soft enough, you can gently microwave it for a few seconds, but be careful not to melt it completely.

Serving & Storage Suggestions

Serve the Orange Walnut Bar Cake sliced, either on its own or with a dollop of whipped cream or a scoop of vanilla ice cream. It pairs beautifully with a cup of tea or coffee.

Store the cake in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to a week. For longer storage, you can freeze the cake (without the frosting) for up to 2 months. Thaw it completely before frosting and serving.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	420 kcal	21%
Total Fat	20g	31%
Saturated Fat	12g	60%
Cholesterol	80mg	27%
Sodium	50mg	2%
Total Carbohydrate	55g	18%
Dietary Fiber	1g	4%
Sugars	35g	–
Protein	4g	8%

Variations & Substitutions

Lemon Walnut Bar Cake: Substitute the orange rind and orange juice with lemon rind and lemon juice for a tangy twist.
Gluten-Free: Use a gluten-free self-raising flour blend for a gluten-free version. You might need to add a binding agent like xanthan gum to improve the texture.
Spice it up: Add a pinch of cinnamon, nutmeg, or cardamom to the batter for a warm and comforting flavor.
Nut-Free: Replace the walnuts with sunflower seeds or chopped dried cranberries for a nut-free option.

FAQs (Frequently Asked Questions)

Q: Can I use margarine instead of butter?
A: While you can, the cake will have a richer flavor and better texture with real butter. Margarine may also affect the consistency of the frosting.

Q: My frosting is too runny. How can I fix it?
A: Add more sifted icing sugar, a tablespoon at a time, until you reach the desired consistency.

Q: Can I make this cake ahead of time?
A: Yes, you can bake the cake a day or two in advance and store it tightly wrapped at room temperature. Frost it just before serving.

Q: My cake is browning too quickly. What should I do?
A: Tent the cake loosely with foil during the last 15-20 minutes of baking to prevent it from browning excessively.

Q: Can I freeze the frosted cake?
A: Freezing the frosted cake is not recommended, as the frosting may become watery upon thawing. It’s best to freeze the cake unfrosted and frost it after thawing.

Final Thoughts

I hope this Orange Walnut Bar Cake brings as much joy to your kitchen as it does to mine. It’s a simple recipe, but the combination of citrusy brightness and nutty crunch is simply irresistible. Don’t be afraid to experiment with variations and make it your own. And most importantly, share it with loved ones and enjoy the warmth and connection that good food can bring. Happy baking!

Orange Walnut bar cake Recipe