Brush simple syrup onto each cake layer for extra moisture

Whether you enjoy the bubbly French 75 cocktail or are looking for a substitute for corn syrup, simple syrup is an essential ingredient for a variety of sweet beverages (both alcoholic and non-alcoholic) and desserts. While you may not add it directly to a batter, this slightly thick liquid sweetener can be useful for retaining moisture in a cake after baking.
Similar to how you might brush an egg wash onto pastry, you can use a pastry brush to lightly apply simple syrup to the top and sides of each cake layer, adding moisture manually. Just be careful to start with a small amount; you want the syrup to soak into the cake without making it overly soggy. This method for enhancing a cake's texture can help prevent mishaps before baking, as most suggestions for increasing moisture involve adding new ingredients to the batter. Even a small addition of extra fat can significantly alter a recipe, often leading to unexpected results.
Don’t have simple syrup on hand? No problem! It’s easy to make at home without a trip to the store. Just combine equal parts granulated sugar and water in a saucepan, bring it to a boil until the sugar dissolves, and then let the syrup cool.
Infuse simple syrup to elevate the cake's flavor

One of the delightful aspects of moistening your cake layers with simple syrup is that this liquid sweetener serves as a fantastic medium for flavor. While it typically has a neutral taste, making simple syrup at home allows you to infuse it with fruits, herbs, spices, or extracts, giving you the chance to get creative with your cakes.
If you're baking a chocolate cake and want it to be irresistibly moist, take a cue from Ina Garten and enhance the chocolate's richness by adding freshly brewed coffee to a saucepan of simple syrup. Planning to create a stunning multi-layered blood orange cake? Boost the fruit's flavor by infusing the syrup with citrus peel. Even a basic white cake can be elevated to a more vanilla-like taste by mixing in some vanilla extract as the syrup simmers.
Keep in mind that infused simple syrup doesn't have the same shelf life as regular sweetener. While store-bought syrup tends to last longer, both it and homemade versions should be refrigerated in airtight containers after use. A standard simple syrup is typically good for about a month, whereas flavored syrups should be consumed within a couple of weeks. If you find yourself without plans to bake more cakes, you can always repurpose infused simple syrup for cocktails, adding a unique twist to your drinks.
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