In a medium bowl, stir together carrots, walnut, apple butter, maple syrup, vanilla extract, eggs, and coconut oil.
2 cups shredded carrots, 1/2 cup chopped walnuts, 1 cup homemade apple butter, 1/4 cup maple syrup, 1 teaspoon vanilla extract, 2 large eggs, 1/4 cup melted coconut oil
Pour wet ingredients into dry ingredients then stir gently until just mixed and incorporated.
Evenly divide batter amongst muffin cups, filling about 3/4 of the way to the top, then bake for 13-15 minutes, or until a toothpick inserted into the center of the muffin comes out clean.
Remove from oven then let cool completely on a wire cooling rack.
In the bowl of a stand mixer with the stand mixer fitted with the paddle attachment, beat together butter and cream cheese until light and fluffy. Add in powdered sugar, 1 cup at a time until frosting reaches desired consistency to frost or pipe. Don't forget to scrape down the sides with each addition of powdered sugar.
½ cup unsalted butter, 8 ounces plain cream cheese, 3 cups powdered sugar
Add in the vanilla extract and mix until incorporated.
½ teaspoon vanilla extract
Once the muffins are cooled completely, frost the tops of the carrot cake muffins with the cream cheese frosting. Garnish with more chopped walnuts on top.