Make pancake mix: Whisk together ingredients in a large bowl and transfer to an airtight container.
Make pancakes: Whisk together mix with 1 1/4 cups water, the eggs, and 2 tbsp. oil in a large bowl until mostly smooth. Heat a large cast-iron skillet over medium heat and grease with 1/2 tbsp. oil. Ladle 1/3-cup portions of batter into skillet, working in batches and adding 1 tsp. oil to skillet in between. Cook, turning once, until pancakes are golden brown on each side and cooked through, about 5 minutes total. Serve with blueberries, butter, and syrup.
*Find at well-stocked grocery stores.
Note: Nutritional analysis is per 2-pancake serving.