Cupcakes Sinking – Why & How to Stop Them?

Hard work is supposed to pay off, but that doesn’t feel true when you’re staring at collapsed cupcakes after spending hours trying to get them just right. It surely has to be one of the most frustrating kitchen experiences. 

You end up in a vicious cycle of questioning your baking skills and wondering, why are my cupcakes sinking? The truth is, there is no single answer. As we’ve said before, baking is just as much a science as it’s an art.

But we’re here to tell you all the reasons why you end up with sunken cupcakes. Read this blog to find out what you might be doing wrong!

What Forms the Perfect Cupcake Structure?

We all yearn for properly formed, fluffy cupcakes. But have you ever wondered what makes them rise? It’s the tiny bubbles in the batter! 

These bubbles are formed when we add leavening agents – or ingredients like baking powder, eggs, or baking soda – to our cupcake mix. They release gases into the batter to expand it. 

So, when you slide those cupcakes into the oven, the heat causes these bubbles to expand even more. The surrounding batter begins to firm up, and that’s how a cupcake gets its shape. 

The structure collapses when you fail to balance the ingredients correctly. For instance, adding too much baking powder might create lots of bubbles that cause the cupcake to rise unevenly. Or even make it dense because the top will rise quickly while the center will remain underbaked.

You May Also Like: Why is My Cake Dense?

However, that’s just one reason. A cupcake’s structure may also collapse because of other reasons that we’ll discuss in the next section.   

7 Baking Mistakes That Lead to Sunken Cupcakes

If you’ve questioned yourself, why are my cupcakes sinking every time you bake, here are seven common reasons why it happens:

Interrupting the Baking Process

Do you often crack open the oven door just to ‘check’ how your cupcakes are doing? That little peek might seem harmless, but it can cause your cake to collapse. 

When you interrupt the baking process out of sheer curiosity, you’re letting the heat inside the oven escape. You’re also allowing cold air to get in there and collapse or condense those cupcakes.

Of course, if you’re batch baking or need to flip the trays, you can’t help but open the oven. If that’s the case, just make sure you go in and get out as soon as possible. 

Not Baking Long Enough

Cupcakes achieve their perfect shape due to two main rising agents: the baking powder and the hot oven air. If you take them out of the oven too quickly, you’re not allowing these physical and chemical agents to react long enough to bake the cake properly.

Underbaking doesn’t only happen when you turn off the oven too soon. Sometimes, it also occurs when you frequently open the door or even bake at a low temperature. If the cupcakes aren’t fully baked, they won’t have enough time to rise and set, and you’ll end up with sunken cupcakes.

The best way to make sure your cakes are fully done is by performing the toothpick test. Simply poke a toothpick right down the cupcake’s center. If it comes out clean, switch off the oven. If not, leave it in there for a little longer.

Pouring In Too Much Batter

Even the experts sometimes make this mistake and later wonder why do cupcakes sink after baking. Remember, a balloon filled with just the right amount of air stays round and bouncy but overfill it, and it bursts. Cupcake liners need space for the batter to expand. If you go overboard, they’ll simply deflate instead of rising beautifully.

The recipe you’re following likely specifies how much to fill those cupcake liners. However, if the instructions are unclear, just consider filling the cupcake tin all the way up to 70%. This should give the batter plenty of space to expand and rise perfectly.

Overworking the Batter

Stirring all the ingredients together is truly satisfying, but you should know when to stop. Blending the batter excessively is merely a recipe for disaster. You might be tempted to get rid of all the lumps once you mix the dry ingredients with the wet ones, but you don’t have to stir too vigorously.

Once you add the dry ingredients, stop beating the batter with a whisk. Instead, gently fold in the batter and stop as soon as the dry streaks disappear. 

Overmixing the batters allows too many air bubbles to form inside. When this batter is put into the oven, it will rise quickly but won’t be able to support the cake’s structure, resulting in a sunken cupcake. 

Using Expired Rising Agents

When was the last time you bought baking powder or baking soda? If you can’t even remember, then you must brace yourself for asking the question: Why my cupcakes sink in the middle?

Cupcakes rise when there’s a reaction between the rising agents and the other ingredients. If your rising agents are way past their expiry, the reaction will never occur – meaning your cupcakes will never rise. 

A good way to test whether your baking powder is good to use is by mixing half a teaspoon of it into warm water. If you see bubbles, it’s good to go. But if not, it’s time to get a new one. For baking soda, just replace the water with vinegar to perform the same test.

Leaving the Batter Out for Too Long

The best cupcakes are formed when you prepare the batter and slide it into the oven right away. Storing the batter away to bake later is a mistake you don’t want to make.

When you do so, you allow the rising agents to have too much contact with the air, and they might end up losing their properties before the batter is put into the oven. Besides, it will also cause many air bubbles to form inside, making your cake collapse once it’s inside the oven.

Baking at a High Temperature

There’s a reason why recipes always mention the oven temperature at which you should be baking your cupcakes. Even if you’re in a hurry, never set the oven temperature higher than recommended to hasten the baking process.

Sure, it might work outwardly by making the cake rise up quickly, but that’s only a temporary effect. Since your cupcakes won’t be fully baked toward the center, they will deflate once they have cooled down.

Top Tips for Baking the Perfect Cupcakes

Now that you know what you shouldn’t do, here’s a list of things you should do so you never have to deal with sunken cupcakes again:

• Allow Ingredients to Reach Room Temperature

Some might think it doesn’t really make a difference, but ingredients combine a lot better if they are all at the same temperature. Don’t store your eggs in the fridge, and if you do, take them out a day before you plan to bake. As for butter, you could either wait for it to come down to room temperature or simply defrost it in the microwave for 15-20 seconds. 

• Stick to the Recipe

You could be an experienced baker running your own bakery for years, but if you’re following a recipe, stick to it! More often than not, we tend to substitute ingredients for our convenience. But that’s a mistake. If you want your cupcakes to turn out as good as the recipe claims, make sure you accurately follow the recipe.

• Invest in a High-Quality Oven Thermometer

Ovens can be deceiving, so you can’t really trust them on the temperature. If the temperature is mismatched, you could have sunken or dry cupcakes. After all the effort you put into it, is that how you want to end up?

An oven thermometer will tell you the exact temperature every time to ensure you don’t mess up at this last, final stage of your baking adventure. 

• Bake in Batches

This one might sound unnecessary, but cupcakes turn out the best if your oven is only concentrating on one tray at a time. It allows the oven to distribute heat properly and evenly so the cake can come out perfectly risen.

However, if you must bake multiple batches at the same time, make sure you flip the trays at regular intervals. And when you do so, be quick. Don’t leave the oven door open for too long. 

• Allow the Cupcakes to Cool After Taking Them Out of the Pan

It’s important to take your cupcakes out of the pan to cool. If they stay in the pan, the residual heat will keep baking them. Since cupcakes are smaller than full-sized cakes, leaving them in too long can cause them to dry out and eventually lose their shape. It’s best to transfer them to a cooling rack to retain their structure and moistness. 

Last Words

Having to question why are my cupcakes sinking every time you bake a batch is a surefire way to draw your interest away from baking. But remember, it takes a lot of trials and runs before you become a master of this craft. 

With this guide at your disposal, you’re now aware of all the things that could be causing your cupcakes to sink. It’s time to wear your apron and head back to the kitchen to bake your perfect batch of cupcakes!