Preheat the Oven: Start by preheating the oven to 350°F (175°C).Prepare the Pan: Grease and flour a 9x13 inch pan to prevent the cake from sticking.
Mix the Batter: In a large bowl, mix together the grated carrots, flour, white sugar, baking soda, baking powder, salt, and cinnamon.
Add the Wet Ingredients: Stir in the eggs, oil, 1 1/4 teaspoons of vanilla extract, pineapple, and 3/4 cup of chopped pecans.
Bake the Cake: Spoon the batter into the prepared pan and bake in the oven for 30 to 40 minutes or until a toothpick inserted into the center comes out clean.Cool the Cake: Allow the cake to cool before spreading the frosting.