Texas Turtle Sheet Cake

If you love a classic Texas sheet cake but want something a little richer and more indulgent, this Texas Turtle version is such a treat. It’s chocolatey, gooey, and beautifully layered with caramel, pecans, and chocolate simple enough for a weeknight, special enough for a celebration.

Ingredients

For the cake:

  • 2 cups all-purpose flour
  • 2 cups granulated sugar
  • 1 cup unsalted butter
  • 1 cup water
  • 1/4 cup unsweetened cocoa powder
  • 1/2 cup buttermilk
  • 2 large eggs
  • 1 tsp vanilla extract
  • 1 tsp baking soda
  • 1/2 tsp salt

For the frosting:

  • 1/2 cup unsalted butter
  • 1/4 cup unsweetened cocoa powder
  • 1/3 cup milk
  • 3 cups powdered sugar
  • 1 tsp vanilla extract

Turtle toppings:

  • 1 cup chopped pecans, toasted if you like
  • 1 cup caramel sauce (store-bought works beautifully)
  • 1/2 cup chocolate chips or melted chocolate

Optional swaps: Use walnuts instead of pecans, or lightly salt the caramel for a sweet-salty finish.

Steps

  1. Preheat your oven to 350°F and lightly grease a 13×18-inch sheet pan. A little parchment on the bottom never hurts.
  2. Whisk together flour and sugar in a large bowl. This helps the cake come together smoothly later.
  3. Warm the butter, water, and cocoa in a saucepan until it just begins to bubble. Pour it over the flour mixture and stir don’t worry, it will look thin at first.
  4. Add buttermilk, eggs, vanilla, baking soda, and salt. Mix gently until the batter is smooth and glossy.
  5. Pour into your pan and bake for 18–22 minutes, just until the center springs back. Sheet cakes bake fast, so keep an eye on it.
  6. Make the frosting: melt butter, cocoa, and milk in a saucepan, then whisk in powdered sugar and vanilla until velvety.
  7. Pour warm frosting over the warm cake, then sprinkle pecans, drizzle caramel, and finish with chocolate. Let it all settle into a beautiful, shiny finish.

Chef’s Tips

  • Toast the pecans for 5 minutes at 350°F this tiny step makes the flavor deeper and warmer.
  • Frost while warm: both the cake and frosting should be warm so they melt together into that signature Texas sheet cake texture.
    s- Store smartly: Keep leftovers covered at room temperature for 2 days or refrigerate for up to 5. The caramel actually gets even gooier by day two.

Variations

  • Salted Turtle Cake: Sprinkle flaky sea salt over the caramel for a bakery-style finish.
  • Mocha Turtle: Add 1 tsp instant espresso powder to the batter for a deeper chocolate note.
  • Extra-Caramel Swirl: Pour half the batter, drizzle caramel, then add the rest before baking.