Rinse artichokes in cold running water. To prep the artichokes, cut the top 1 inch off of each artichoke. Then using kitchen sheers trim the points off the petals. Next cut the artichokes in half lengthwise and remove the inedible fuzzy part and any purple tipped leaves with a spoon. Rub lemon all over the artichokes.
In a small bowl combine salt, garlic powder and black pepper. Sprinkle over the inner and outer leaves of the artichokes.
Place artichokes in a baking dish, drizzle with olive oil. Pour water and white wine over the top. Cover with foil and bake for 40 - 50 minutes or until you can remove leaves easily.
Transfer to serving platter, squeeze a little lemon over the top if desired and serve with melted butter or mayonnaise for dipping.