Watergate Salad Cake
Watergate Salad Cake transforms the classic fluffy pistachio dessert into an irresistibly moist cake perfect for potlucks and family gatherings. Loaded with crushed pineapple, pistachio pudding mix, and a cloud-like whipped topping, this pale green retro cake is as fun to look at as it is to eat — and it actually gets better the next day.
Equipment
- 9x13 inch baking pan
- Large mixing bowl
- Whisk or wooden spoon
- Measuring cups and spoons
- Rubber spatula
- Cooling rack
- Medium mixing bowl For frosting
Ingredients
For the Cake
- 1 box white cake mix 15.25 oz
- 1 package instant pistachio pudding mix 3.4 oz
- 1 cup club soda 240ml; can substitute lemon-lime soda, ginger ale, or sparkling water
- 1/2 cup vegetable oil 120ml
- 3 large eggs room temperature
- 1 can crushed pineapple, undrained 8 oz / 227g; do not drain
- 1/2 cup chopped pecans or walnuts optional; about 60g; toast at 350°F for 5-7 minutes for extra flavor
For the Frosting
- 1 package instant pistachio pudding mix 3.4 oz
- 1 can crushed pineapple, undrained 8 oz / 227g; do not drain
- 1 container whipped topping, thawed 8 oz / 227g
- 1/2 cup sweetened shredded coconut about 40g
- 1/4 cup chopped pecans or walnuts for garnish; about 30g
Instructions
- Preheat oven to 350°F (175°C). Grease a 9x13 inch baking pan with butter or non-stick spray, dust lightly with flour, and tap out any excess.
- In a large mixing bowl, whisk together the white cake mix and one package of instant pistachio pudding mix until evenly combined with no lumps.
- Add the club soda, vegetable oil, and eggs to the dry mixture and stir with a wooden spoon or whisk for about 2 minutes until smooth and well combined.
- Pour in the entire can of undrained crushed pineapple and gently stir until evenly distributed, then fold in the chopped pecans or walnuts if using — do not overmix.
- Pour the batter into the prepared pan, spread evenly to the corners, and bake for 30–35 minutes until a toothpick inserted in the center comes out clean — do not open the oven during the first 25 minutes.
- Remove from the oven and let the cake cool in the pan on a rack for 15 minutes, then allow it to cool completely to room temperature before frosting (about 1 hour).
- In a medium bowl, stir the second package of pistachio pudding mix into the undrained crushed pineapple until the pudding dissolves and thickens, then gently fold in the thawed whipped topping until smooth and fluffy.
- Spread the frosting evenly over the cooled cake, then sprinkle shredded coconut and chopped pecans over the top, pressing gently so they adhere.
- Cover the cake and refrigerate for at least 2 hours (overnight is even better) before cutting into squares and serving cold.
Notes
- Do NOT drain the pineapple — the juice is essential for moisture in both the cake and the frosting.
- Use room temperature eggs for better incorporation and a more even texture.
- Check the cake at 30 minutes; overbaking will dry it out despite the pineapple moisture.
- Never frost a warm cake — the topping will melt and slide off. Full cooling is non-negotiable.
- The cake tastes significantly better after chilling overnight as the flavors meld together.
- Toast the pecans or walnuts at 350°F for 5–7 minutes before adding to bring out their buttery flavor.
- Avoid fresh pineapple — it contains enzymes that break down proteins and will affect the cake and frosting texture. Use canned only.
- For the club soda, lemon-lime soda, ginger ale, or sparkling water all work as substitutes; plain water works but yields a denser cake.
- Store covered in the refrigerator for up to 5 days. Freeze individual slices wrapped tightly in plastic wrap and foil for up to 3 months; thaw overnight in the fridge.
- For a from-scratch version, substitute the box mix with 2 cups flour, 1½ cups sugar, ½ cup butter, 1 cup milk, 3 eggs, 2 tsp baking powder, and 1 tsp vanilla, then add the pistachio pudding and pineapple as directed.
Nutrition
Serving: 1SliceCalories: 385kcalCarbohydrates: 52gProtein: 4gFat: 18gSaturated Fat: 6gPolyunsaturated Fat: 4gMonounsaturated Fat: 7gCholesterol: 47mgSodium: 420mgPotassium: 130mgFiber: 1gSugar: 34gVitamin A: 3IUVitamin C: 6mgCalcium: 6mgIron: 5mg
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