Rocky Road Texas Sheet Cake

by Suzanne on April 5, 2011

in Sweet Things

Texas Sheet Cake is one of my “go to” cakes to feed a crowd because everyone loves it, its easy to make, and I usually have all the ingredients on hand.  I like to make the cake with rocky road frosting to make it a little different, but if you are not fond of nuts and marshmallows then just make the frosting without them, no matter which way you decide to make the frosting you will love the cake. The cake is moist, soft and buttery, with the frosting it makes it perfect.

Rocky Road Texas Sheet Cake

2 cups unbleached flour
2 cups sugar
1 cup of butter
1 cup water
1/3 cup cocoa powder
2 eggs
1/2 cup buttermilk
1 tsp. baking soda
1 tsp. vanilla

Frosting Ingredients:
1/2 cup butter
6 T. buttermilk
4 T. cocoa powder
1 tsp. vanilla
3 cups powdered sugar
1 cup chopped nuts
2 cups mini marshmallows

Step 1: Spray a 10 X 15 in. pan with cooking spray or grease the pan with butter.  Pre-heat oven to 400 degrees.
Step 2: In a large mixing bowl mix flour and sugar together.  Heat butter, cocoa powder and water in a medium size saucepan until it boils.
Step 3: Pour the hot chocolate mixture into the flour sugar mixture and mix well.
Step 4: While mixing add one egg at a time, then add buttermilk, vanilla and baking soda.
Step 5: Pour into prepared pan and bake for 20 minutes.

Making the Frosting:
Start the frosting about 5 minutes before the cake is done.
Step 1: In a small saucepan melt butter with cocoa powder and milk together until it comes to a boil.  This mixture will look curdled but don’t worry it will all come together when the powdered sugar is mixed in.

frosting looks curdle but will come together when you beat in the sugar

Step 2: When the timer goes off for the cake take out and carefully place the marshmallows on the top.  Turn the oven off and put the cake back in the oven in until they get puffed up and slightly browned.

Marshmallows will brown and puff up like these

Step 3: While the marshmallows are puffing up finish the frosting.  Put the hot chocolate mixer in a med-large mixing bowl and add all the powdered sugar, mix on low until all the sugar is incorporated then turn to high and beat until it creamy and no lumps are in it.Step 4: Take out the cake and pour the frosting as evenly as possible over the hot cake.  Then gently spread the frosting around to cover any spots that might not have been covered.  Do not go over the frosting very much with your spatula because it cools quickly and will crack and loose it’s sheen.  Sprinkle nuts on top immediately, if you wait too long to put the nuts on the frosting will cool and not hold the nuts.  Cool completely and cut into squares.
Serves 18-20

Linked to: Joy of Desserts

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1 Heidi April 5, 2011 at 7:21 am

Oh my gosh— this has to be one of my favorite cakes!! And this looks so good!

2 Suzanne April 5, 2011 at 7:26 am

Thanks Heidi, its mine too, its whats for Lunch today ha ha!

3 The Blue-Eyed Bakers April 5, 2011 at 8:46 am

We ADORE Texas sheet cake…and are in love with the nuts and marshmallow addition! What a genius idea! This looks so delicious..!

4 Suzanne April 5, 2011 at 11:25 am

thank you dears, you must try it soon.

5 Mandy April 5, 2011 at 10:55 am

I'm really not a great baker, the pressure of being precise stresses me out! BUT, I am a Texan and I can definitely make a sheet cake. I absolutely love the addition of marshmallows, chocolate and nuts on top. It's brilliant and sounds (and looks) delish! Great post!

6 Suzanne April 5, 2011 at 11:27 am

Funny, I feel the same way about cooking verses baking, to me baking is easier. Glad you like the sheet cake and now you have a new take on an old favorite.

7 Linda April 6, 2011 at 4:07 am

I am going to double your recipe for a church dinner tonight. I was going to make Homesick Texan's version, but I saw yours this morning, and honestly, it looks mouth-watering. I love the marshmallows!

8 Suzanne April 6, 2011 at 5:01 am

thank you Linda, hope you love it!

9 Linda December 12, 2013 at 4:39 pm

I forgot to tell you – they did! I’m now at another church, and I’m going to use your recipe for our upcoming Wed night dinners.

10 Alida April 6, 2011 at 1:49 pm

I love Texas Sheet Cake and can hardly wait to give this version a try! Just found you on the UBP and can hardly wait to read more from you 🙂

joy & blessings,


11 Nutmeg Nanny April 7, 2011 at 5:56 am

What delicious rich chocolate cake! I would gladly eat a few slices of this 🙂

12 Suzanne April 7, 2011 at 11:49 am

thank you, just need to pop on over when you have that urge and have a virtual bite 🙂

13 Paula (Salad in a Ja April 9, 2011 at 4:31 pm

Great variation on Texas sheet cake. Really kicks it up a notch without a lot of extra trouble. Love it.

14 Joy @ Joy of Dessert April 11, 2011 at 9:33 am

Sounds and looks delicious. What a great variation. Thank you for participating and linking to Joy of Desserts.

15 Phuong April 15, 2011 at 5:34 pm

oh, yummo!

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