Thermal and Chemical Clash: Pizza succeeds because of the Maillard reaction—the browning of amino acids and sugars in cooked dough, aged cheese, and savory meat. Pineapple introduces high concentrations of citric acid and water that disrupt this chemical balance, cutting sharply through the fat of the cheese rather than complementing it.
Textural Rupture (Sogginess): Pineapple is roughly 86% water. When baked at high oven temperatures, the fruit releases excess moisture directly into the center of the pie, turning the crispy, structured crust soggy and breaking down the texture of the mozzarella.
Enzymatic Degradation: Fresh pineapple contains bromelain, a enzyme that actively breaks down proteins. When combined with dairy, it accelerates the breakdown of the cheese's protein matrix, altering its texture and causing the dairy fats to separate unevenly.
Dominant Flavor Profile: Traditional pizza relies on a delicate balance of umami, salt, and fat. Pineapple's intense sweetness and sharp acidity dominate the palate, masking the nuanced flavors of fermented dough, garlic, and herbs instead of harmonizing with them.