Whisk the flour, baking powder, baking soda, and salt together in a large bowl until combined. Set aside. In a medium bowl, whisk the egg, sugar, and melted cannabutter together until combined. Whisk in the sour cream, milk, and vanilla extract. Pour the wet ingredients into the dry ingredients, whisk a few times to begin combining, and then stir with a rubber spatula to finish combining. Batter is very, very thick. Fold in the strawberries and chocolate chips.