In a large mixing bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until evenly combined. Set aside.
In a medium bowl, whisk together the egg, buttermilk, whole milk, melted butter, and vanilla extract until fully combined.
Pour the wet ingredients into the dry ingredients and fold together gently with a spatula until just combined — lumps are fine. Let the batter rest for 5 minutes.
While the batter rests, slice the banana, halve the berries, and portion out mini chocolate chips, coconut, and whipped cream into small bowls so they're ready to use.
Heat a nonstick skillet or griddle over medium-low heat for about 2 minutes, then lightly grease with cooking spray or butter. The pan is ready when a drop of water sizzles and evaporates immediately.
Using a squeeze bottle or spoon, pour a 4-inch round circle for the bunny head, then pour two small elongated ovals directly above it for ears. Cook until bubbles form and edges look set, about 2–2.5 minutes, then flip and cook 1–1.5 minutes more until golden brown.
Transfer finished pancake pieces to a baking sheet in a 200°F oven to keep warm while you cook the remaining batter.
Place the round pancake on a plate, position the two ear pieces above it, then press banana slices onto the ears, add mini chocolate chip eyes and nose, place halved berries for cheeks, sprinkle coconut on the ears if using, and add a whipped cream tail if desired.
Serve immediately with maple syrup on the side, and add decorations just before serving for the freshest look.