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How Many Boxes of Cake Mix for Two 9-Inch Rounds? Tested!

How Many Boxes of Cake Mix for Two 9-Inch Rounds? Layer cakes are great for birthdays and just about any type of important occasion. They’re even better when they are homemade with lots of care and love.

The prospect of baking a layer cake can be intimidating if you’ve never tried it before. Still, knowing some important details should help you feel more confident about that baking assignment.

Learn more about how much cake mix you will need to bake a layer cake and other important details by reading on.

How Many Boxes of Cake Mix Are Needed to Make Two 9-Inch Rounds?

One box of cake mix produces enough batter to fill a 9-inch round cake pan. To create a two-layer round cake, home bakers will need to use up two boxes of cake mix. The two layers of cake must be cooled down, evened out, and frosted before they are put together.

How Many Boxes of Cake Mix for Two 9-inch Rounds
How Many Boxes of Cake Mix for Two 9-inch Rounds?

How Many Boxes of Cake Mix Will You Need to Make Two 9-Inch Rounds?

Baking a layer cake can be intimidating.

Working on a single cake round may have been relatively easy since you could just concentrate on that single element. Now that you have two rounds to worry about, there are more chances to make mistakes.

To avoid getting stressed out, you should aim to simplify things. For starters, figure out how much batter you will need to complete your layer cake.

A single box of cake mix produces enough batter to fill one 9-inch round cake pan. Knowing that, you will just need to pick up an extra box of cake mix on your way home from the supermarket.

If you’ve already baked one cake round successfully using a specific cake mix, you can just double up on that.

How Many Boxes of Cake Mix Will You Need to Fill Two Square Cake Pans?

Do you have square cake pans instead of round pans? If so, how many boxes of cake mix will you need to create a two-layer cake using those pans?

The answer to that question will depend on the size of your square pans.

8-inch square cake pans can hold roughly the same amount of batter that 9-inch round pans do. That means you can also use two boxes of cake mix to create two square layers of cake.

An 8-inch square pan will roughly hold the same batter as a 9-inch round pan.
An 8-inch square pan will roughly hold the same batter as a 9-inch round pan.

How Do You Assemble a Layer Cake?

Now that you know how much cake mix will be needed to bake a layer cake, you can start working on that.

Baking the layers you will need is simple enough. You can just follow the instructions on the boxes and remain confident that you’ll come up with your desired results.

Assembling the layer cake can be a bit tricky. If you fail to take certain steps, your layer cake may look uneven or become unstable.

Detailed below are the steps you must take to ensure that your layer cake turns out as intended.

Step 1: Make Sure the Cakes Are Completely Baked

Look at the box for instructions on how long to cook your batter. Follow them as well as you can to ensure that your cake rounds are fully cooked.

You can double-check the doneness of your cake layers by using a toothpick.

Simply stick a toothpick into the middle of the cake round and pull it out. If the toothpick looks clean, then that means the cake is done.

Step 2: Remove the Cakes from the Pans

Next, you need to get the cakes out of the round pans. This should be easy to do if you buttered the pans beforehand and laid down sheets of parchment paper.

Flip the round pan upside down with your hand underneath the cake. Hopefully, the cake will get dislodged after that.

If the cake isn’t coming out, grab your knife and run it along the edges of the pan. That should help dislodge the cake.

Step 3: Cool the Cakes Down

Cooling down the cakes is crucial because they are more likely to crumble if they are handled while warm. So, how should you cool them down?

Using a wire rack is a good idea.

According to Masterclass, using a wire rack to cool down cakes is smart because it exposes every inch of the cake to air. The cake layers will cool down faster because of that.

Cooling cake layers on a wire rack allows air to circulate freely through the cake layers, and will cool them faster.
Cooling cake layers on a wire rack allows air to circulate freely through the cake layers, and will cool them faster.

Step 4: Even Out the Cake Layers

You’ll have a hard time assembling your layer cake if the rounds are uneven. Work on flattening them out first.

Setting them upside down on the wire rack may actually help flatten them out. If they are still a bit too rounded, you can use a serrated knife to trim them down to size.

Step 5: Apply Frosting to the Cake Layers Separately

Frosting the cake layers is easy if you do them separately.

Apply frosting to the top and the sides of each layer. Once the frosting is applied, use a spatula to even things out.

Don’t use too much frosting at this point because you will be adding more later.

Frost your cake layers separately before stacking them.
Frost your cake layers separately before stacking them.

Step 6: Let the Frosting Settle

You now need to give the frosting a chance to settle on top of the cake layers. Speed that process up by keeping the cake layers inside your refrigerator.

Leave the cake layers inside your refrigerator for at least 30 minutes so the frosting can set properly.

Step 7: Assemble the Layer Cake

All that’s left to do now is to assemble the layer cake.

Place the first layer on the stand then put some frosting on it. Follow that by setting the second layer in place and covering the entire cake with your leftover frosting.

Assembling layer cakes becomes easier if you chill your layers and let the frosting harden before stacking them.
Assembling layer cakes becomes easier if you chill your layers and let the frosting harden before stacking them.

Conclusion to How Many Boxes of Cake Mix for Two 9-inch Rounds

Baking your own layer cake is easy enough as long as you have the right ingredients and tools for the job. Use the information provided here so you can put together your own stunning layer cake.

Frequently Asked Questions about How Many Boxes of Cake Mix Are Needed to Make Two 9-Inch Rounds

How Many Boxes of Cake Mix Do You Need to Fill a Sheet Pan?

You will need three boxes of cake mix to fill a sheet pan. However, you will only need to use about a quarter of the cake mix from the third box.

How Long Do You Need to Bake a 9-Inch Round Cake?

A 9-inch round cake should be baked at 350 degrees Fahrenheit (177 degrees Celsius) for at least 30 minutes. Use a toothpick to check if the cake is done baking.

Author Bio

Daniel Iseli (Head Chef)

Hi, my name is Daniel and I am passionate about cooking. I have been cooking for the past 20 years and am happy to share my best recipes and cooking-related knowledge with you.