Heat oven to 350°. Grease a mini bundt tin (or muffin tin) with butter. If you're using a tin with grooves in it, use a pastry brush to make sure the butter gets in all the crevices. Sprinkle flour over the molds to ensure each one is lightly floured.
Cream butter with the sugars until paler and fluffier. About 3 minutes.
Add honey, heavy cream, egg and vanilla. Mix until combined.
Add in ½ a cup of the prepared apple puree and mix until incorporated in batter.
Add in the flour, salt, baking powder and baking soda until the batter comes together (it will get thicker).
Pour into prepared mold, until just below the surface line of the mini bundt mold (they will rise during baking).
Bake for 16-18 minutes. Check doneness by inserting a knife or toothpick into the center of one (it should come out clean when ready).
Let cool for 10 minutes and use a spoon to gently pop the bundts out on to a cooling rack. Sprinkle with powdered sugar if desired.