Ingredients

• 1 (15.25 ounce) package yellow cake mix (such as Betty Crocker®)
• 2 cups cold water, divided
• 1/2 cup oil
• 3 eggs
• cooking spray
• 1 1/2 cups confectioners' sugar
• 1 (8 ounce) package low-fat cream cheese
• 1 teaspoon vanilla extract
• 1 (8 ounce) container whipped topping
• 1 cup boiling water
• 1 (3 ounce) package strawberry flavored gelatin (such as Jell-O®)
• 1 cup sliced strawberries, or to taste

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Instructions

1. Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13-inch pan with cooking spray.
2. Combine cake mix, 1 cup cold water, oil, and eggs in a large bowl. Beat together until batter is smooth. Spread the batter into the 9x13-inch pan.
3. Bake in preheated oven until a toothpick inserted into the center comes out clean, 34 to 38 minutes. Remove the cake from the oven. Cool slightly, about 5 minutes. Press down on hot cake with a piece of waxed paper or clean towel to flatten. Let cool completely, about 30 minutes.
4. Beat confectioners' sugar, cream cheese, and vanilla extract together in a bowl until smooth; blend in whipped topping. Spread mixture evenly across the cake.
5. Stir boiling water and gelatin together in a bowl until gelatin is completely dissolved, about 2 minutes; add 1 cup cold water. Pour over the cream cheese mixture. Let the gelatin sit until it begins to set, 5 to 7 minutes. Spread sliced strawberries on top.
6. Refrigerate until gelatin is completely set, about 1 hour.