In a mixing bowl, whisk together the baking powder, cornstarch, salt, and flour. Gradually whisk in the beer and continue stirring until the batter is smooth and ribbony. Set aside.
Crab filling
Mix mascarpone, chives, and shallot in a bowl until thoroughly combined. Season with salt to taste.
Carefully fold in the crab meat without breaking up any lumps, and mix gently to combine.
Refrigerate for 10-15 minutes while you prepare the aioli. Follow the link in the ingredients section for the Lemon Aioli recipe.
Frying the beignets
Fill a heavy cast-iron skillet ¾ full with peanut oil (about 3 cups) and heat oil to 375 ℉.
Roll ping-pong size balls (about 1 Tbsp) of the crab mixture and use a spoon to drop them onto the top of the beer batter.
Gently roll the crab balls in the batter to completely coat. If you leave any holes, the mascarpone will leak out. Lift the balls from the batter and let them slide off the spoon into the hot oil. Fry in batches until crisp and deeply golden brown, about 4 minutes. Keep your eye on the temperature and adjust the flame if necessary to keep the temperature at 375 ℉.
When the beignets are done, use a spider strainer to remove them from oil, and place on paper towels to drain.
Prepare a serving dish with a layer of lemon aioli. Place the beignets onto the aioli. Sprinkle with flaky salt. Garnish with lemon slices and whole chives.
Notes
This was a big undertaking, but it was worth it because it tastes so good, it looks so interesting, it's surprisingly different, and my guests absolutely loved them!I also made a dessert version of this with chocolate and raspberry sauce. It was amazing!