Preheat oven to 450 degrees F. Place cast iron skillet inside to preheat.
In a blender, add eggs, milk and vanilla. Lightly blend.
Add dry ingredients. Lightly blend on low setting until no dry pockets. Pour into a glass mixing bowl.
Pull skillet out of oven, add coconut oil and coat carefully all sides. Carefully pour pancake mixture into skillet. Use caution, oil will splash! Once pancake mixture has been evenly added to skillet, quickly add sliced apples and blackberries. Any pattern will do!
Place skillet back into oven for 10-15 minutes. Check for golden edges and cooked middle. Remove from oven and allow to cool for 5 minutes. Dust with powdered sugar and squeeze lemon on individual portions. Devour!