Place a 12-inch cast-iron skillet in the oven and preheat to 400F

Combine the eggs, flour, milk, sugar, molasses, pumpkin pie spice, and salt in a blender and puree until smooth

Remove the pan from the oven and add the butter until it's melted

Swirl to coat the bottom and sides of the pan

Pour the pancake batter into the pan

Bake for about 15-20 minutes, until the pancake is golden brown

Meanwhile, slice the blackberries in half

In a small bowl, toss the blackberries with lemon juice and powdered sugar

When the pancake is done, dust with powdered sugar and top with the blackberries

Serve immediately