
Preheat oven to 325º Fahrenheit.
In a large bowl, whisk together dry ingredients. In a medium bowl, whisk together wet ingredients until smooth. Pour wet ingredients mixture to dry ingredients bowl and stir until well combined and with no lumps.
Line muffin tin with 12 cupcake liners, preferably parchment paper. Pour or use a disher to fill muffin tin 3/4 full.
Bake in the middle rack for 16-17 minutes. Do not overbake. Begin checking for doneness every minute starting at 15 minutes: insert a toothpick into the center of a cupcake. The toothpick should come out with crumbs but not completely coated like the center is liquid. As soon as the toothpick comes out this way (Crumbs but not coated), remove the pan from the oven. Let sit 5 minutes then remove cupcakes and cool completely on a wire rack.
While cupcakes cool, make the frosting. In a medium bowl, combine all ingredients. Microwave in 60-second bursts, stirring very well in between each burst, until ingredients are completely melted and totally smooth. Set aside and let cool to room temperature or chill in the refrigerator until firm but scoopable.
Frost cupcakes when cupcakes are completely cool and frosting is set. Sprinkle with chocolate jimmies, if desired and not on a strict paleo diet.