01 - Combine flour, granulated sugar, baking powder, baking soda, and salt in a large mixing bowl. Whisk until well blended.
02 - In a separate bowl, whisk together whole milk, egg, melted butter, and vanilla extract.
03 - Pour the wet ingredients into the dry mixture and gently mix until just combined. Do not overwork the batter.
04 - Preheat a nonstick skillet or griddle over medium heat and lightly coat with butter. Pour about 2 tablespoons of batter per pancake, forming 12 thin pancakes roughly 3.5 inches in diameter. Cook until bubbles form on the surface and edges appear set, about 1 to 2 minutes. Flip and cook another 30 to 60 seconds. Transfer to a rack and let cool completely.
05 - Arrange pancakes in pairs of similar size. Place one pancake bottom-side up. Spoon a generous scoop of raspberry ripple ice cream onto the pancake. Scatter white chocolate chunks over the ice cream. Top with the second pancake, pressing gently. Smooth the edges if needed. Place assembled sandwiches on a parchment-lined tray and freeze for at least 2 hours until solid.
06 - Melt milk chocolate and coconut oil in a heatproof bowl set over simmering water, stirring until fully melted and smooth. Allow to cool slightly until it is pourable but not hot.
07 - Remove frozen sandwiches from the freezer. Dip each sandwich halfway into the melted chocolate shell or drizzle chocolate over the tops. Return sandwiches to the parchment-lined tray and freeze for 10 minutes, until chocolate is firm.
08 - Serve sandwiches directly from the freezer. Allow to stand at room temperature for 2 to 3 minutes before serving for the ideal texture.