01 -
Fire up your oven to 350°F (177°C) first, then spray or grease a 9x13 dish so nothing sticks later.
02 -
Toss the dry angel food mix, instant pistachio pudding, eggs, oil, and pineapple plus all its juice into a roomy bowl.
03 -
Grab your whisk or mixer and blend everything until it looks silky and lump-free.
04 -
Pour the finished batter into your prepped dish and bake for about 30–35 minutes. You’ll know it’s done when a toothpick poked in the middle comes out clean.
05 -
Take the cake out and let it cool right in the pan on a rack—don’t even think about frosting until it’s totally cool.
06 -
Beat the other box of pistachio mix with cold whole milk until it starts to thicken up in a bowl.
07 -
Take your thawed whipped topping and gently stir it into the thick pudding until well blended, but don’t overmix.
08 -
Spread that fluffy frosting all over the cooled cake, cover loosely, and chill it at least 2 hours to let everything set.
09 -
Just before cutting, throw some chopped pistachios on top and you’re ready to dish out slices.