"Just When You Thought You'd Cuisine it All" begins by introducing Timon, a meerkat and his warthog friend, Pumbaa. At the start of the episode, after eating some bugs, Timon doesn't think they have enough taste, so he suggests that he and Pumbaa learn how to cook.
Timon and Pumbaa are taking a cooking class taught by Chef Claude, a French cook. He shows Timon and Pumbaa that one way to make food is by adding eggs, flour, and dough. However, Timon and Pumbaa become unsuccessful on making the food, making Claude believe that they can't cook, so they can't take his class.
When the chef leaves, Timon refuses to give up cooking, so decides for himself and Pumbaa to finish what they started. Pumbaa, however, wants to eat some bugs, but goes along with Timon's idea.
Timon and Pumbaa continue to cook what they started making earlier. When Timon turns up the dial of the oven, the food comes to life and chases the duo. After the conflict with the food, Claude comes back and sees the kitchen looking a mess, so he kicks Timon and Pumbaa out. Timon still wants to prove to Claude that he and Pumbaa can cook.
Timon and Pumbaa return to the kitchen and show Chef Claude a dessert they made, calling it Timon and Pumbaa's Parfait. Claude refuses to taste the Timon and Pumbaa's dessert, so the two friends show him other different types of desserts they created. Claude then admits that Timon and Pumbaa can cook, but the duo refuses to leave until he actually tastes their parfait. When Claude does so, he swiftly says that it's good and runs off. However, Timon and Pumbaa don't think their parfait is that good and decide that cooking is not for them.
Later, Timon and Pumbaa decide to eat some bugs. They spot one flying towards them and they chase it.