Preheat oven to 350°F (177°C). Grease three 8-inch cake pans, line with parchment paper rounds, then grease the parchment paper. Parchment paper helps the cakes seamlessly release from the pans. (If it’s helpful, see this parchment paper rounds for cakes video & post.)
Whisk the flour, baking soda, cinnamon, allspice, and salt together in a large bowl.
Whisk the rest of the cake ingredients in a medium bowl. Pour wet ingredients into dry ingredients and whisk until completely combined. Fold in 1 and ½ cups toasted pecans. (Save the rest for garnish.) You should have about 6 to 7 cups of batter.
Spread batter evenly between the 3 prepared cake pans. Bake for 26-29 minutes or until a toothpick inserted in the center comes out clean. Rotate pans halfway through baking.
Remove cakes from the oven and allow to cool completely in the pans set on a wire rack. Once completely cooled, remove cakes from pan and level the tops off so they are flat. I simply use a serrated knife. Discard the tops or eat. YUM!
In a large bowl using a handheld or stand mixer fitted with a whisk or paddle attachment, beat the cream cheese and butter together on medium-high speed until smooth, about 2 minutes. Add the confectioners’ sugar, vanilla extract, and a pinch of salt. Beat on low speed for 30 seconds, then increase to high speed and beat for 3 minutes until completely combined and creamy. Add more confectioners’ sugar if frosting is too thin, a little milk if frosting is too thick, or an extra pinch of salt if frosting is too sweet. Frosting should be soft, but not runny.
First, using a large serrated knife or cake leveler, layer off the tops of the cakes to create a flat surface. Place 1 cake layer on your cake turntable, cake stand, or serving plate. Evenly cover the top with frosting. Top with 2nd layer, more frosting, and then top with the 3rd layer. Spread remaining frosting all over the top and sides. Decorate the sides and top of the cake with the remaining toasted pecans. Refrigerate cake for at least 15-20 minutes before slicing. This helps the cake hold its shape when cutting.
Cover leftover frosted cake tightly and store in the refrigerator for up to 5 days.