Position an oven rack in the center of the oven and preheat to 425 degrees F (or preheat a grill to 425 degrees F). Melt the butter in a cast-iron pan, tilting the pan to coat the sides.
In a large bowl, mix the pancake batter (according to the package instructions, with the amount of water listed), yogurt and extract. Rest for 10 minutes, then pour the batter into the prepared pan. Add the raspberries and chocolate chips.
Place the pan in the oven on the center rack or on the grill over indirect heat. Cook until the batter fluffs up and the center is slightly set, 20 to 25 minutes.
Top with the almonds and a dusting of powdered sugar. Serve warm with a scoop of ice cream.