Preheat your oven to 350°F (175°C).
Line a muffin tin with cupcake liners.
In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.
In a large bowl, cream together the softened butter, cannabis-infused butter, and granulated sugar until light and fluffy, about 2-3 minutes.
Add the eggs one at a time, beating well after each addition.
Mix in the vanilla extract.
Gradually add the dry ingredients to the butter mixture, alternating with the milk, beginning and ending with the dry ingredients. Mix until just combined.
Divide the batter evenly among the cupcake liners, filling each about 2/3 full.
Bake for 20-25 minutes, or until a toothpick inserted into the center of a cupcake comes out clean.
Allow cupcakes to cool in the tin for 5 minutes, then transfer to a cooling rack to cool completely.
In a large bowl, beat together the softened butter and cannabis-infused butter until creamy and well combined.
Gradually add the powdered sugar, one cup at a time, beating well after each addition.
Add the vanilla extract.
Add the milk, one tablespoon at a time, until the frosting reaches your desired consistency.
Once the cupcakes are completely cool, frost them using a spatula or a piping bag.