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    Home » Recipes » Desserts » Cake

    Rocky Road Texas Sheet Cake Recipe (Video)

    August 14, 2020 By Brandy 1 Comment

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    This rocky road Texas sheet cake is a delightful twist on everyone's favorite recipe. Chocolate cake topped with mini marshmallows that have been tossed in frosting then sprinkled with walnuts. This is one GIANT cake! This post contains affiliate links.

    If you like sheet cake you'll love our classic Texas sheet cake recipe AND our chocolate peanut butter version (this one is especially delicious if you like buckeyes!).

    Watch our step by step video!

    Texas sheet cake is just about the easiest cake to make for a crowd. 99% of the time I make my cakes using a boxed mix. I really can't tell the difference when making a birthday cake, but that extra 1% is for Texas sheet cake. I have no problem whipping out one from scratch for the family on a weeknight. So fast, so easy (bakes up in 25 minutes!) and so forgiving. I love that you frost it while it's warm for the smoothest, melt in your mouth, frosting.

    pan of rocky road sheet cake

    Years ago I saw a chocolate marshmallow cake that I knew would be fantastic in sheet cake form. Dana shared how her mom used to toss marshmallows in frosting before adding them to the top of a chocolate cake. I applied that technique to my favorite Texas sheet cake recipe (doubling the frosting to make sure I had enough to coat the marshmallows) and it was DIVINE. Ridiculously rich--- I mean, it has twice the amount of frosting! One of the best cakes we ever had and has been a family favorite ever since.

    slice of sheet cake on plate

    After one slice it'll be hard to ever imagine eating any other kind of cake!

    Rocky Road Texas Sheet Cake

    The ingredients are basic:

    Cake: Flour, sugar, cocoa powder, salt, and baking soda. You’ll also need butter, vinegar, eggs, milk, water and vanilla. You probably have most of these ingredients on hand.

    Frosting: Butter, powdered sugar, cocoa powder, milk, vanilla, and chopped nuts.

    Marshmallows: You'll also need a bag of mini marshmallows (about 6 cups).

    If you’re wondering about the whisk used in my video, it’s a Danish dough whisk and I use it for so many recipes! I rarely pull out my kitchen mixer for bread or batters.

    baked sheet cake in pan without frosting

    The technique for making the cake and frosting is similar. You'll melt the butter with the cocoa powder and a bit of liquid to make a chocolate syrup mixture that will be stirred into your dry ingredients. So once you finish the cake, give your saucepan a rinse and get ready to do the same thing with the frosting!

    rocky road texas sheet cake baked in pan and frosted

    While the cake bakes, mix up the frosting so that it's ready to pour over the hot cake. Toss the mini marshmallows in the frosting mixture, pour over the cake then sprinkle with nuts. Ooey, gooey perfection. As it cools, the frosting will set up, making it easier to serve, but it will still be soft.

    pan of rocky road sheet cake with slice missing

    This cake is so rich, a little goes a long way! I cut my classic Texas sheet cake into 15 portions, but this one goes a lot farther. Cut 4 rows, then 8 rows, for 32 slices.

    rocky road texas sheet cake slice on plate

    3 More Chocolate Desserts You'll Love

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    Rocky Road Sheet Cake Recipe

    rocky road texas sheet cake baked in pan and frosted

    Rocky Road Texas Sheet Cake

    This rocky road Texas sheet cake is a delightful twist on everyone's favorite recipe. Chocolate cake topped with mini marshmallows that have been tossed in frosting then sprinkled with walnuts. This is one GIANT cake!
    5 from 5 votes
    Print Pin Rate
    Prep Time: 15 minutes minutes
    Cook Time: 30 minutes minutes
    Cooling: 30 minutes minutes
    Total Time: 1 hour hour 15 minutes minutes
    Servings: 32 slices
    Calories: 325kcal

    Ingredients

    Cake

    • 2 cup all purpose flour
    • 2 cup white sugar
    • 1 teaspoon salt
    • 1 cup butter
    • 1 cup water
    • ⅓ cup baking cocoa (cocoa powder)
    • 2 eggs
    • ½ cup milk
    • 1 Tbsp. vinegar
    • 1 teaspoon baking soda
    • 1 teaspoon vanilla

    Chocolate Frosting

    • 1 cup butter softened
    • ⅔ cups baking cocoa
    • 2 teaspoon vanilla
    • ⅔ cups milk
    • 7 ½ cups powdered sugar sifted
    • 1 bag mini marshmallows 6 cups

    Toppings

    • 1 cup nuts chopped

    Instructions

    Cake Instructions

    • Preheat oven to 350 degrees.
    • Mix flour, sugar, and salt in a large bowl. Set aside.
    • Heat butter, water, and cocoa powder in a sauce pan over medium heat. Stir as butter melts. Bring to a simmer then remove from heat.
    • Slowly pour the butter/chocolate mixture over the dry ingredients. Stir.
    • Mix eggs, milk, vinegar, baking soda and vanilla together in a small bowl. Add to the large bowl and mix until combined.
    • Pour batter into a greased 12" x 17" baking sheet.
    • Bake for 25 minutes.

    Frosting Instructions

    • Heat butter, cocoa powder, vanilla and milk in a saucepan until butter has melted. Pour over powdered sugar and beat with electric mixer until smooth. Stir in marshmallows.
    • Spread frosting over hot cake. Do your best to have an even layer of frosting (the marshmallows make this a little tricky, but it will be just fine!) Sprinkle with nuts.

    Nutrition

    Calories: 325kcal
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    About Brandy

    Welcome! I'm Brandy, mother to 5 darling kiddos and a cute black lab named Toby. My husband is in the Coast Guard so we've lived all over the place, turning each house into a home. I love baking, sewing, making cute things with my kids, and sharing what I've learned with all of you!

    Comments

    1. Laurie says

      August 15, 2020 at 1:11 am

      Oh my goodness! A candy cake!
      I understand why you cut the pieces smaller!

      Reply
    5 from 5 votes (5 ratings without comment)

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