Quick Description
This High-Protein Chocolate Texas Sheet Cake is rich, soft, and melt-in-your-mouth moist with a warm chocolate frosting poured right over the cake. Made with sour cream and eggs for extra protein and tenderness, this classic dessert is perfect for parties, potlucks, or anytime you need a guaranteed crowd-pleaser.
Servings & Timing
Serves: 16–20 slices
Prep Time: 15 minutes
Bake Time: 18–22 minutes
Frosting Time: 10 minutes
Total Time: ~40 minutes
Ingredients List
Cake
- 1 cup water
- 1 cup butter
- 3 tbsp unsweetened cocoa powder
- 2 cups all-purpose flour
- 2 cups granulated sugar
- 1 tsp baking soda
- ½ tsp salt
- ½ cup sour cream
- 2 large eggs
- 1 tsp vanilla extract
Frosting
- 6 tbsp milk
- 3 tbsp unsweetened cocoa powder
- ½ cup butter
- 3¾ cups powdered sugar
Instructions
1. Preheat Oven
Preheat oven to 350°F (175°C). Grease a 10×15 or 9×13 baking pan.
2. Make Chocolate Base
In a saucepan, combine water, butter, and cocoa powder. Bring to a gentle boil, stirring until smooth.
3. Mix Dry Ingredients
In a large bowl, whisk together flour, sugar, baking soda, and salt.
4. Combine
Pour hot chocolate mixture over dry ingredients. Stir until smooth.
5. Add Wet Ingredients
Mix in sour cream, eggs, and vanilla until fully combined.
6. Bake
Pour batter into prepared pan. Bake 18–22 minutes until a toothpick comes out clean.
7. Prepare Frosting
In a saucepan, heat milk, cocoa powder, and butter until melted. Remove from heat.
Whisk in powdered sugar until smooth.
8. Frost Cake
Pour warm frosting over warm cake and spread evenly.
9. Cool & Serve
Let set 15–20 minutes before slicing.
Nutrition (Per Slice – Approximate)
Calories: 360
Protein: 7g
Carbs: 55g
Fat: 15g
Fiber: 2g
Sugar: 42g
Benefits
- Higher Protein Dessert from eggs & sour cream
- One-Bowl Batter
- Ultra Moist Texture
- Feeds a Crowd
- Perfect for Events
Additional Notes
- Use Greek yogurt instead of sour cream for extra protein
- Add chopped walnuts or pecans if desired
- Serve slightly warm for gooey frosting
- Chill for firmer slices
Dietary Info
High-Protein: ✅
Vegetarian: ✅
Low-Carb: ❌
Gluten-Free: ❌
Keto-Friendly: ❌
Brief Introduction
Texas sheet cake is famous for its thin, tender crumb and glossy chocolate frosting. This version stays true to the classic while adding protein-boosting ingredients for a richer bite.
Step-by-Step Cooking Guide
- Heat chocolate mixture
- Mix dry ingredients
- Combine everything
- Bake
- Make frosting
- Pour frosting on cake
- Cool & slice
Ingredient Details & Substitutions
Sour Cream:
Adds moisture and protein. Greek yogurt works too.
Cocoa Powder:
Use unsweetened for best flavor.
Butter:
Real butter gives best texture.
Recipe Variations & Serving Suggestions
Variations
- Peanut butter frosting
- Espresso chocolate version
- Chocolate-orange cake
- Nut-topped version
Serve With
- Vanilla ice cream
- Whipped cream
- Fresh berries
- Coffee or milk
Storage & Make-Ahead
Refrigerate: 4 days
Freeze: 2 months
Reheat: microwave 10–15 seconds
FAQs
Can I use a different pan size?
Yes, baking time may vary slightly.
Can I reduce sugar?
Yes, reduce by ½ cup if preferred.
Can I make cupcakes?
Yes, bake 14–16 minutes.
Optional Personal Story
This cake never lasts more than a day in my house. The frosting sinks into the warm cake and makes every bite ridiculously soft and chocolatey.
