Preheat your oven to 350°F and lightly grease a 9x13 inch baking sheet or pizza pan. Remove the sugar cookie dough from the refrigerator and let it sit at room temperature for 2-3 minutes to make it easier to work with. Flatten and press the dough evenly across the prepared pan, creating an even thickness. Use a fork to poke small holes all over the dough to prevent it from puffing up during baking. Bake for 10 to 15 minutes until the edges are light golden brown but the center still looks slightly underbaked—this keeps the crust tender. Remove from the oven and let cool completely to room temperature, about 15-20 minutes.

While the crust cools, place the softened cream cheese in a large bowl and beat until smooth and creamy. Add the granulated sugar and vanilla extract, mixing until well combined and fluffy. Gently fold in the Cool Whip topping using a spatula until you have a smooth, spreadable frosting with a mousse-like texture. I like to make this a few steps ahead so it's ready to spread right when the crust finishes cooling. Transfer the frosting to the refrigerator until you're ready to assemble the pizza.

While the crust is baking and cooling, prepare all your fruit so it's ready for assembly. Drain the mandarin oranges and pineapple tidbits thoroughly on paper towels, pressing gently to remove excess moisture—this prevents a soggy crust. Peel and slice the kiwis into 1/4-inch rounds. Hull and slice the strawberries into uniform pieces. Measure out the raspberries and blueberries into separate bowls. Toss all the prepared fruit together in a large bowl with the lemon juice, which brightens the flavors and helps prevent browning. I find that prepping the fruit this way means you can quickly assemble the pizza while everything is fresh.

Once the cooled crust from Step 1 is at room temperature, spread the cream cheese frosting from Step 2 evenly across the entire surface using an offset spatula or the back of a spoon. Arrange the fruit from Step 3 on top of the frosting in whatever pattern appeals to you—you can create concentric circles, scatter the fruit randomly, or arrange it by color for a beautiful presentation. Press the fruit gently into the frosting so it adheres well. Refrigerate the assembled pizza for at least 1 hour before serving, which allows the frosting to set and keeps everything fresh and firm. This chilling time also gives the flavors a chance to meld together.