What comes to your mind when we speak of the term “cake”? Something sweet? Something coming in different flavors and having different appeal? Something that makes the very essence of every special day of our lives? Or something round? Most of the people started to describe a cake as something round, among all its other noteworthy features. Cakes are said to be the descendants of ancient bread because of which most of the cakes are traditionally baked in round shape.

Some others say as initially the cakes were made with hands so it was the only possible easy shape that could be given to this dessert item. But with changing times, nowadays we can spot quite a few varieties of rectangle chocolate cake, rectangle vanilla cake, and rectangle cakes of other popular flavors. On someone’s birthday, one can easily spot a rectangular cake over the cake cutting ceremony either getting it as a surprise birthday cake online or as a rectangle cake recipe baked by someone dear to the birthday boy/ girl. But trying something unusual yet unique as a rectangular is worth everyone’s try! Trust us on this! If you are willing to pamper someone with rectangular cake on birthday, then here’s an easy birthday cake recipe for you to give it a try. Pull out your rectangular baking pan, get the batter ready, and let’s ring into the celebrations.


  • 1 cup plain flour
  • 3 cups self-raising flour
  • 2 cups caster sugar
  • 300 g butter at room temperature, cubed
  • 1 ¼ cups buttermilk
  • 6 eggs
  • 1 ½ teaspoons vanilla extract
  • 3 cups of buttercream
  • Some fresh fruits, dry fruits, and colorful edible sprinkles

Let’s Start Baking!

  • Start by preheating the oven to 280 F or 140 C (low and slow for this cake).
  • Grease a large rectangle cake pan with butter – 9 x 13 inches.
  • Line the base and sides with baking paper.
  • Take a large mixing bowl and pour all the ingredients as per the quantity mentioned.
  • Mix it well on low speed for 30 seconds or until just combined.
  • Increase the speed and beat it for a minute or two ensuring the butter is evenly combined.
  • Make sure the batter is smooth and thick.
  • Pour the batter in the already prepared pan and smoothen out the upper surface of the batter with the back of the spoon.
  • Bake for 1 hour in the preheated oven and keep a check on your cake by pricking the knife, toothpick, or fork to check to come out clean or not.cake in rectangular pan
  • If it does, the cake is cooked.  If not, then bake for 14-20 mins more while keeping a check on it.
  • Remove it from the oven rack and place it on a wire rack to cool for 10 minutes. Your rectangular cake is ready to be served.
    baked cake
  • To give it a more birthday like feel, coat it with a generous amount of buttercream frosting from its top to its sides.
  • Even out the layering of the cream and scoops out the extra cream. Let it set for a while.
  • Furthermore, you can decorate your cake with fresh fruits, nuts, and some sprinkles to add an additional layer of goodness or to make it seem show-stopping.
    chocolate cake with sprinkles
  • Place a birthday candle on top of it and present it to the birthday boy/girl of the hour.

Decorating a homemade rectangle cake recipe for a birthday celebration can be a challenge for first time home chefs and bakers. If you do not trust your baking instincts, following the above or any other cake recipe thoroughly will help you in baking and prepping the perfect cake. Also, an essential tip for you, do not forget to keep a bowl of cold or chilled water by your side as you ice your cake. Dip the spatula in this water simultaneously to apply frosting on the cake. Doing this will help you apply an even, non-clumpy layer of icing that is smooth.

Now that you know the detailed tidbits of baking a fantastic birthday cake, you are ready to get started with the process!

That’s all! That’s simple! It is to make a rectangular birthday cake for your loved ones.