Texas Sheet Cake Muffins with Fudgy Chocolate Icing

Texas sheet cake muffins turn the familiar cocoa-rich cake and warm chocolate icing into individual portions baked in a standard muffin pan. The batter comes together quickly on the stovetop, and icing each muffin while it is warm gives the tops the soft, fudgy finish associated with the classic Texas-style dessert.

Ingredients

1 cup (125 g) all-purpose flour, measured by spooning it into the cup and leveling
¾ cup (150 g) granulated sugar
¼ teaspoon baking soda
¼ teaspoon fine salt
¼ cup (21 g) unsweetened natural cocoa powder
½ cup (113 g) unsalted butter, cut into pieces
½ cup (120 ml) water
1 large egg (about 50 g without shell), at room temperature
¼ cup (60 g) sour cream, at room temperature
½ teaspoon vanilla extract

For the icing:

¼ cup (56 g) unsalted butter
2 tablespoons (10 g) unsweetened natural cocoa powder
3 tablespoons (45 ml) milk, plus up to 1 teaspoon (5 ml) if needed
1½ cups (180 g) powdered sugar, sifted if lumpy
¼ teaspoon vanilla extract
⅛ teaspoon fine salt
¼ cup (30 g) chopped pecans, optional

Instructions

Heat the oven to 350°F (175°C). Line a standard 12-cup muffin pan with paper liners. Have the egg and sour cream ready at room temperature so they mix more evenly into the warm chocolate base.
In a medium bowl, whisk together the flour, sugar, baking soda, salt, and cocoa powder. Break up any cocoa lumps so the dry mixture is even.
Put the ½ cup butter and water in a small saucepan. Warm over medium heat, stirring, just until the butter melts and the mixture reaches a gentle simmer. Remove the pan from the heat; it does not need to boil for an extended time.
Pour the hot butter mixture into the dry ingredients and whisk until smooth. Let it stand for about 3 minutes, until warm rather than piping hot. In a small bowl, whisk the egg, sour cream, and ½ teaspoon vanilla. Whisk this into the chocolate batter until combined. Avoid beating longer than needed.
Divide the batter evenly among the 12 liners, filling each about two-thirds full. Bake for 15–18 minutes, rotating the pan once if your oven browns unevenly. The muffins are ready when the tops spring back lightly and a toothpick inserted in the center comes out with a few moist crumbs, not wet batter. Do not rely on a raw-batter taste test; the egg must be cooked through.
While the muffins bake, make the icing. Melt the remaining ¼ cup butter in a small saucepan over low heat. Whisk in the cocoa and milk until smooth, then remove from the heat. Whisk in the powdered sugar a little at a time, followed by the vanilla and salt. The icing should be thick but pourable; add up to 1 teaspoon milk if it is too stiff.
Let the muffins rest in the pan for 3 minutes, then spoon or spread icing over them while they are still warm. Sprinkle with pecans, if using, before the icing sets. Cool in the pan until the muffins are stable enough to lift, about 10 minutes. Serve warm or at room temperature.

Tips

Measure flour lightly. Packing flour into a measuring cup can make these muffins dense. For the most consistent result, weigh 125 g; otherwise spoon flour into the cup and level it without pressing.
Keep the batter smooth, not overmixed. Mix just until the egg and sour cream disappear into the batter. Overmixing after adding flour can make the crumb tough.
Adjust icing consistency gradually. Warm icing spreads readily over warm muffins. If it begins to firm up, gently rewarm it over low heat; if it is runny, whisk in a little more powdered sugar.
Choose the right cocoa. Natural unsweetened cocoa gives the expected chocolate flavor and acidity for this baking soda-based batter. Dutch-process cocoa is less acidic and may change the rise and flavor, so use natural cocoa when possible.

Serving Suggestions

Serve the muffins slightly warm, when the icing is soft, or let them cool until the tops are set for easier handling. A glass of cold milk, coffee, or unsweetened tea balances the sweet chocolate. For dessert, add a small scoop of vanilla ice cream or a spoonful of lightly whipped cream. If serving a group, arrange them on a platter after the icing has stopped dripping.

Variations

For a nut-free version, leave out the pecans; the icing works just as well without them. To add crunch without nuts, sprinkle a few mini chocolate chips over the warm icing. A pinch of cinnamon in the dry ingredients gives the chocolate a gentle warm note, while a little espresso powder can deepen its flavor without making the muffins taste strongly of coffee. For a tangier crumb, use plain full-fat yogurt in place of sour cream in the same quantity; the texture may be a touch less rich.

Storage and Reheating

Cool the muffins completely before storing so trapped steam does not make the tops sticky. Refrigerate them in a covered container within 2 hours of baking; they keep for 3–4 days. For the best texture, bring refrigerated muffins to room temperature or warm one in the microwave for about 8–12 seconds. If reheating a portion until hot, leftovers should reach 165°F (74°C). The icing may soften in the microwave, so use short bursts.

To freeze, arrange completely cooled, iced muffins in a single layer until firm, then transfer them to a freezer-safe container with parchment between layers. Freeze for up to 2 months for best quality. Thaw overnight in the refrigerator or for a few hours at room temperature, and serve once fully thawed. Do not leave muffins out for more than 2 hours before refrigerating or freezing.

Frequently Asked Questions

Are these muffins the same as traditional Texas sheet cake?
They use a similar cocoa-and-butter flavor profile and warm chocolate icing, but the muffin-pan format makes individual portions rather than one thin cake. Recipes for Texas sheet cake vary, including whether they use nuts and how the icing is made.

Can I make the batter ahead?
It is best to bake the batter soon after mixing. Baking soda starts reacting once the wet and dry ingredients meet, so a long wait can reduce the muffins’ rise. You can measure the dry ingredients and prepare the icing ingredients in advance instead.

Can I make these without paper liners?
Yes. Grease each cup thoroughly with butter or baking spray, including the sides, and allow the muffins to rest for a few minutes after baking before loosening them carefully. Liners make cleanup easier and help protect the soft muffins when lifting them out.

Why did my muffins sink in the middle?
They may have been underbaked, the oven may have been too cool, or the batter may have sat too long before baking. Check that the oven is fully heated and use the toothpick and spring-back cues rather than opening the door repeatedly during baking.

Can I double the recipe?
Yes. Double every ingredient and bake in batches if you have only one 12-cup pan. Fill the second batch just before it goes into the oven rather than leaving its mixed batter on the counter while the first batch bakes.

Do I have to ice the muffins while they are warm?
Warm muffins help the icing spread into a smooth layer, which gives the characteristic soft finish. If you prefer a thicker topping, let them cool longer before icing; the icing will sit more visibly on top and set sooner.

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