Why Cakes Sink, Crack or Turn Dry: A Practical Guide to Baking Reliable Cakes at Home

A homemade cake is one of the most generous things you can make for someone. But cakes can also be frustrating. One collapses in the middle as it cools, another rises into a cracked dome, a third comes out dense or dry, and sometimes the whole thing refuses to leave the pan. Each of these problems has a cause, and most of them can be traced to a handful of factors: how ingredients are measured and mixed, the temperature of the ingredients and the oven, the pan and the baking time. This guide explains how a basic butter cake works, how to prevent the most common problems and what to do when something goes wrong.

How a cake works

A classic butter cake is built from a balance of ingredients that each play a role.

• Flour provides structure. Cake flour, with less protein than all-purpose flour, produces a finer, more tender crumb.
• Sugar sweetens, keeps the cake moist and tender and helps it brown. It also helps trap air when creamed with butter.
• Butter adds flavor and tenderness, and when creamed with sugar it traps tiny air bubbles that help the cake rise.
• Eggs bind the ingredients, add moisture and richness and set into structure as the cake bakes.
• Leaveners such as baking powder and baking soda produce carbon dioxide gas that expands the air bubbles in the batter.
• Liquid such as milk or buttermilk hydrates the flour and activates the leaveners.

In the oven, the air bubbles expand, the leaveners release more gas, and the batter rises. Then the eggs and starches set, locking the cake into its risen shape. Most cake problems come from disturbing this balance or this sequence.

The creaming method, done right

Many butter cakes start with creaming: beating softened butter and sugar together until pale and fluffy. This step is essential because it creates the air bubbles that leaveners expand.

1. Start with softened butter. Butter should be about 65 °F (18 °C): cool to the touch, bending without breaking and leaving a dent when pressed. Butter that is too cold will not trap air; butter that is too warm or melted cannot hold it.
2. Beat butter and sugar for three to five minutes on medium speed until the mixture is noticeably lighter in color and fluffy. Scrape down the bowl occasionally.
3. Add room-temperature eggs one at a time, beating well after each. Cold eggs can make the butter firm up and the mixture look curdled.
4. Add the dry and wet ingredients alternately, usually beginning and ending with the dry ingredients, mixing on low speed only until combined.

Overmixing after the flour is added develops gluten, which makes the cake tough and can cause tunnels and peaks. Mix until you no longer see streaks of flour, then stop.

Preparing the pan

A cake that sticks can tear apart when you try to remove it. Prepare your pans before you start mixing.

• Grease the pan with butter or nonstick spray, including the sides.
• Line the bottom with a circle of parchment paper.
• Grease the parchment and dust the pan with flour, tapping out the excess. For chocolate cakes, use cocoa powder instead of flour.

Use the pan size the recipe calls for. A smaller pan gives a deeper layer of batter that bakes more slowly and may sink or remain undercooked in the middle. A larger pan gives a thin cake that bakes faster and can dry out. Fill cake pans about half to two-thirds full.

Preventing a sunken middle

A cake that sinks in the center is one of the most common problems. Possible causes include:

• Underbaking. The center had not set when the cake came out of the oven. This is the most common cause.
• Opening the oven too early. A blast of cool air in the first two-thirds of the baking time can make a rising cake collapse before its structure has set.
• Too much leavening. Extra baking powder or baking soda makes bubbles grow too large, rise quickly and then collapse.
• Too much sugar or fat weakens the structure.
• Old leavening agents. Baking powder loses strength over time, so the cake may not rise properly.
• An oven that is too cool. The batter rises but does not set quickly enough.
• Overbeaten eggs or batter with too much air, which escapes and causes collapse.

Measure carefully, especially leavening, check the expiration date of your baking powder, use an oven thermometer and keep the oven door closed until the cake is nearly done.

Preventing domes and cracks

A tall dome with a crack down the middle usually means the edges of the cake set before the center finished rising. The batter in the center keeps rising and pushes up through the crust.

Common causes are an oven that is too hot, a dark pan that conducts heat quickly, too much flour or too much leavening. Solutions include:

• Checking the oven temperature with an oven thermometer.
• Using light-colored aluminum pans or lowering the oven temperature by about 25 °F (15 °C) when using dark pans.
• Measuring flour by weight or with the spoon-and-level method.
• Wrapping the outside of the pan with damp cake strips or folded strips of damp towel secured with foil. This keeps the edges cooler so the cake rises more evenly.

A small dome is normal and can be trimmed off with a serrated knife before frosting layer cakes.

Preventing dense or dry cakes

Dense cakes often result from cold ingredients, under-creamed butter and sugar, overmixing after adding flour, too much flour, or old leavening agents.

Dry cakes usually come from too much flour, overbaking or too little fat or liquid. Cakes continue to bake from residual heat after leaving the oven, so a cake baked until bone dry in the center will be dry once cooled.

Weigh your flour, check the cake early and store it properly after baking. Brushing layers with a simple syrup of equal parts sugar and water, warmed until dissolved, can add moisture to a slightly dry cake.

Knowing when a cake is done

Do not rely only on the time in the recipe; ovens vary. Start checking about five to ten minutes before the suggested time. A cake is done when:

• It has risen and the top springs back when gently pressed in the center.
• The edges have started to pull away slightly from the sides of the pan.
• A toothpick or thin skewer inserted into the center comes out clean or with a few moist crumbs, but no wet batter.

For many butter cakes, the internal temperature is about 200 to 210 °F (93 to 99 °C) when done.

Cooling and removing the cake

Let cakes cool in the pan on a wire rack for about 10 to 15 minutes. This allows them to firm up slightly. Then run a thin knife around the edge, place a rack or plate on top and invert the pan. Peel off the parchment and let the cake cool completely before frosting, ideally right side up on a rack. Frosting a warm cake causes the frosting to melt and slide off.

If a cake sticks, return it to the warm oven for a minute to soften the fats, or place the pan on a warm, damp towel for a few minutes and try again.

Rescuing a cake that went wrong

Not every imperfect cake has to be thrown away.

• Sunken cake: Fill the dip with frosting, whipped cream and fruit, or cut it into cubes for a trifle.
• Cracked or domed cake: Trim the top with a serrated knife and turn it upside down for a flat surface.
• Dry cake: Brush with simple syrup, layer with fruit and cream, or turn it into cake pops or a bread pudding.
• Broken cake: Layer pieces with whipped cream, fruit or pudding in glasses for a beautiful dessert.

Altitude and cakes

At high altitudes, above about 3,000 feet (900 m), lower air pressure causes cakes to rise faster and dry out more quickly. Bakers often reduce leavening and sugar slightly, increase liquid and raise the oven temperature by 15 to 25 °F (8 to 15 °C). Many flour manufacturers and agricultural extension services publish high-altitude baking guides.

Storing cakes

Unfrosted cake layers can be wrapped tightly in plastic wrap and stored at room temperature for a day or two, or frozen for up to three months. Frosted cakes with butter frosting can stay at room temperature for a day or two in a cake dome. Cakes with cream cheese frosting, whipped cream or fresh fruit should be refrigerated. Let refrigerated cakes come to room temperature before serving, as the butter in the cake makes it firm when cold.

Frequently asked questions

Why did my cake fall after I took it out of the oven? It was probably underbaked, or it contained too much leavening. Test doneness with a toothpick and check that your baking powder is fresh.

Can I use all-purpose flour instead of cake flour? Yes. For each cup of cake flour, use one cup of all-purpose flour minus two tablespoons, and add two tablespoons of cornstarch. Sift them together.

Why do my cakes stick to the pan even though I greased it? Greasing alone is not always enough. Line the bottom with parchment paper and grease and flour the sides.

Is it important for ingredients to be at room temperature? Yes. Room-temperature butter, eggs and milk combine more smoothly and trap air better, producing a lighter cake.

How do I get flat cake layers? Use the correct pan size, measure accurately, check your oven temperature and use cake strips around the pans.

The bottom line

Reliable cakes come from balance and patience. Measure accurately, use softened butter and room-temperature eggs, cream the butter and sugar well and mix only until combined after adding flour. Prepare the pan properly, check your oven temperature, keep the door closed during most of the baking time and test doneness carefully. When something goes wrong, there is usually a simple cause and often a delicious way to rescue the result. With these habits, your cakes will be tender, even and ready to celebrate any occasion.