Wash strawberries very gently in cool water and carefully dry with paper towels. Let stand at room temperature for about 30 minutes to ensure the strawberries are completely dry. Don’t dip strawberries unless they are completely dry, otherwise chocolate will become cloudy or won’t stick to the berries.
Line a large sheet pan with parchment paper, wax paper, or a silicone baking mat and set it aside. If using baking bars, coarsely chop the chocolate. Be patient when melting the chocolate and avoid rapid temperature changes. Do not microwave for too long or too many times; stir the chocolate frequently as it melts. Allow the coated strawberries to harden at room temperature instead of refrigerating or freezing them.
Add all but 2 tablespoons of the chocolate melting wafers to a large microwave-safe bowl. Add 1 teaspoon oil. Microwave for 15 seconds, then stir vigorously for 15 seconds. Continue to do this until the chocolate is melted. Once chocolate is melted, add the reserved 2 tablespoons of chocolate and stir until it melts.
Once chocolate is fully melted and smooth, hold a berry by the stem and dip it into the melted chocolate. Gently swirl to cover in the chocolate. Carefully slide the bottom of the strawberry against the edge of the bowl to remove any excess chocolate. Place the strawberry on the lined sheet pan. Repeat with remaining strawberries. If the melted chocolate is getting too hard to dip, heat it in the microwave for another 15 seconds and remix. You may need to add 1/2 teaspoon or more of oil too.
To drizzle chocolate on top, melt 2 ounces of white chocolate with 1/2 teaspoon of oil. Transfer the melted chocolate to a small plastic bag, seal it without air, and cut off a tiny tip. Drizzle over the strawberries. For a raised drizzle, wait until the chocolate has hardened; for a melted effect, drizzle right after coating the strawberries. You can also sprinkle on toppings like sprinkles or crushed Oreos before the chocolate sets. Let the strawberries cool at room temperature.