Tips for Making Sponge Cake

Sponge cake egg muffin production

In the Western world, sponge cake is a representative western pastry that has won people's favor. Currently in China, sponge cakes have become a food suitable for all ages and seasons, gradually entering thousands of households.

One,Sponge Cake Concept and production principle

The production of sponge cake utilizes egg white foaming properties to incorporate large amounts of air into the egg liquid. This is then combined with flour and baked, forming a type of leavened pastry.It gets its name from its spongy texture resembling a porous sponge. In the West, it is also known as meringue cake or plain cake. During the production process, high-speed whipping reduces the surface tension of egg white globular proteins and increases their viscosity. High-viscosity components help form bubbles early on, allowing for quick air incorporation to create foam. The mechanical action causes mild denaturation in the proteins of both the albumen and yolk.

Denatured protein molecules can coagulate into a skin that forms a very stable film around the entrained air. Due to surface tension, the egg white foam contracts into spherical shapes. The cake's structure is further stabilized by the addition of flour and the presence of proteins in the mixture, which retain gas bubbles. The heat from baking causes the gases within the foam to expand, resulting in a light, porous texture with some elasticity and toughness.denatured protein molecules can condense into a skin, forming a very stable film that encloses the air mixed in, while due to surface tension, the protein foam contracts into spherical shapes. Protein colloids have viscosity and the added flour ingredients adhere around the foam, making it very stable and able to retain the gas. During heating, the gas within the foam expands from heat, resulting in a porous and elastic product.

Two, sponge cake ingredients and formula

To make a sponge cake, use eggs,sugar, flour,and a small amount of oil. Fresh eggs are the most important condition as they have a thick, gas-retaining egg white. Eggs that have been stored for long periods should not be used for making cakes. Cake flour is often chosen; it has fine texture, soft gluten but enough strength to support expansion during baking and form the cake's structure. If only high-gluten flour is available, you can treat part of it by steaming on a rack, cooling, then sieving to remove lumps. Alternatively, add some cornstarch to reduce gluten content. For making cakes, sugar should be refined, such as white or powdered sugar for optimal mixing.Coarse sugar may not dissolve quickly enough in the short time of mixing, affecting cake quality. Sponge cake production has two main methods: one uses only egg whites, called "angel" sponge, and the other includes both whites and yolks, known as "yellow" sponge. The recipes differ accordingly. Mixing can reduce the elasticity of the dough. Angel SpongeAngel sponge is made using a 5:3:3:1 ratio of egg white, sugar, flour, and oil. Since it uses no yolk, its foaming properties are excellent, resulting in a fine, white, soft texture almost like an airy cake.

Angel cakes are typically made using only egg whites without yolks.Yellow Sponge Cake Traditional yellow sponge cake recipes use either a 1:1:1 or a 2:1:1 ratio of egg to sugar and flour. This method uses both the whites and yolks; if done well, it can match the angel sponge's quality.

The angel cake is made with an egg white, sugar, flour, and oil in a ratio of 5:3:3:1. Because it does not use yolks, its foaming properties are excellent; the internal structure is relatively fine, the color is pure white, the texture is soft, and it almost appears puffed.

Three, sponge cake whipping process1. Separating and whipping whites from yolks

The whipping process is complex with strict requirements for the sequence of adding ingredients. Separate egg whites and yolks by using two mixers: one for whites, another for yolks.

1. Egg whites and egg yolks separated mixing method

Whip egg whites with sugar until foamy, then gently fold in whipped yolks and gradually add flour to make batter. During mixing, if the texture is too dry, add a small amount of oil along with the yolk to utilize its emulsifying properties.2. Whole egg whipping methodThis method involves whipping eggs and sugar together first before adding other ingredients. During the operation, to solve the problem of dryness in the mouthfeel, a small amount of oil can be added when beating the yolk, using the emulsifying property of the yolk to mix the oil with it evenly.

Place all eggs and sugar in a mixer for 2 minutes on low speed, then switch to medium-high until the mixture is white and stiff enough when lifted with a finger.

Slowly add flour while using slow speed or manual mixing to ensure even distribution.3. Emulsification method

Emulsification involves adding emulsifiers during cake preparation.

Emulsification refers to the method of adding emulsifiers when making sponge cakes. Cake emulsifiers, also known as cake oil, stabilize foam and oil-water systems. They simplify the traditional process, making it easier for mass production while improving texture to stay moist without drying out.

In the mixing process, add 10% of the selected flour along with the well-beaten egg mixture before gradually adding remaining ingredients on high speed until a creamy color is achieved.Margarine Butter

Four,

Cake moldingAfter batter preparation, it should be molded promptly into the oven. The whipping time for angel sponge should not exceed 15 minutes, while emulsification can allow more time. The shape of the cake is determined by the mold's shape.

1. Mold selection

Molds come in various materials like tin, stainless steel, aluminum, and heat-resistant glass with shapes including round, rectangular, fluted, heart-shaped, and square. They can be high or low-sided. Common molds are typically made from tin, stainless steel, galvanized iron, aluminum metal, or heat-resistant glass materials. Choose molds based on the recipe's needs, density, and internal texture. Sponge cakes, being soft and easily baked, allow for flexible mold selection to match the desired shape of the finished product.2. Requirements for pouring batter into molds To prevent adhesion to the pan or mold, ensure clean molds with a layer of oil paper on the inside. Coat the edges and bottom with oil and sprinkle some flour if needed. The edges can be divided into high and low types. For sponge cakes, fill molds about 7-80% full for optimal expansion. Ensure that when baked, the cake fills the mold without spilling over or leaving too much empty space which can affect texture. Four, baking

Correct setting of baking temperature and time is crucial. Incorrect temperatures can result in a sunken top or cracked center. Ideal temperatures range from 180°C to 220°C for about 30 minutes.

To ensure that the cake can easily be removed from the mold after baking without sticking to the baking tray or the mold, the mold must be cleaned before filling with batter. A layer of clean parchment paper should be laid around and at the bottom of the mold, with oil evenly applied on it. Final processing after removal from the oven involves checking if the cake is fully baked by observing color changes, gently pressing on it, or using a toothpick test.

Once verified as done, remove the cake and flip it over onto a rack to cool completely before packaging. Cakes can be naturally cooled or cooled with a fan away from direct airflow. In actual operation, the amount of batter should be such that when baked, the cake just fills the pan without overflowing or having a protruding top. Five, quality standardsA properly baked sponge cake is golden on top, light yellow inside, with fine and uniform texture, no large air bubbles, soft yet slightly elastic. It should not have uncooked centers and should be moist but not dry or sticky.

Following these steps can result in a delicious homemade sponge cake!

Six, conclusion

The baking temperature has a significant impact on the quality of the baked cake. If too low, the top of the cake will sink and the interior becomes rough;if too high, the top bulges, the center easily cracks, the edges contract inward, and the cake is harder. The ideal baking temperature range is 180℃-220℃. The baking time also significantly affects the quality of the baked cake. Under normal circumstances, the baking time should be about 30 minutes. If too short, the interior will be sticky and uncooked;if too long, it becomes dry with hard edges. The baking time should be determined based on the size and thickness of the cake, as well as the sugar content in the recipe. With more sugar, a slightly lower temperature for a longer time is needed;with less sugar, the temperature can be higher for a longer time.

2. Cake removal after baking

Before removing from the oven, check if the cake is fully baked by observing its surface color to determine its doneness. Gently press on the top of the cake; it should spring back when released, indicating that it is cooked. If it does not spring back, it is not fully baked. Another direct method involves inserting a thin bamboo skewer into the center of the cake and pulling it out. A smooth skewer with no batter indicates that the cake is fully baked; if there's any batter on the skewer, more baking is needed. If it has not been fully baked, continue baking until cooked through. Once fully baked, remove from the oven, take it out of the mold immediately and flip it over onto a cooling rack so that the top faces down to cool completely before packaging.

There are two methods for cooling: natural cooling where the product should be handled with care, not stacked, and moved infrequently; or forced air cooling, which should not directly hit the surface of the cake to prevent skin formation. To maintain freshness, cakes can be stored in a refrigerator at 2℃-10℃. Six, The quality standard for sponge cakes is: golden brown on top with a milky white interior, uniform color and texture, light weight, flat or slightly raised top, fine and even internal structure without large air bubbles, soft and elastic. There should be no raw spots inside; the taste is neither too wet nor too dry, with moderate sweetness.

In summary, by mastering the above selection of ingredients, recipe formulation, principles, and methods, you can also make a batch of delicious cakes!

The quality standard for sponge cake is: the surface should be golden yellow, the interior pale yellow, with consistent coloration, relatively light texture, flat or slightly convex top, fine and uniform structure, no large pores, soft yet elastic, without any raw spots inside, not sticky or dry but slightly moist, with a moderate balance of egg flavor and sweetness.

In summary, after mastering the above selection of ingredients, formula, principles, and preparation method, you can also make a delicious cake!