Pecan pie was a dessert originating from the planet Earth.
One of Trip Tucker's favorite dishes was pecan pie. According to him, "it may not be good for the body, but it sure is good for the soul." Taking his advice, T'Pol later brought a slice of pecan pie to her quarters. (ENT: "Breaking the Ice")
At the end of the writers' second draft script of "Breaking the Ice", T'Pol began to eat a slice of pecan pie in the mess hall, while there alone, instead of taking it to her quarters.
Pecan pie was among the spoils of the Ferengi raid conducted against Enterprise NX-01 in 2151. (ENT: "Acquisition")
Early the next year, while stranded in the desert region of the Torothan homeworld, Tucker wished he could have had pecan pie. (ENT: "Desert Crossing")
In 2371, Kathryn Janeway treated Gathorel Labin of the Sikarians to dinner. One of the dishes he enjoyed was pecan pie, and he asked for the recipe. (VOY: "Prime Factors")