Yield: 10 servings
Heat oven to 350 F. Use pan with removeable bottom. Grease 9x1-inch tart pan with nonstick cooking spray. Wrap outside bottom and side of pan with aluminum foil to prevent leaking.
Heat chocolate and butter in 1-quart saucepan over low heat, stirring frequently, until melted; cool slightly.
Mix sugar, flour and eggs in large bowl with spoon until well blended. Stir in chocolate mixture. Pour into pan. Bake 30-35 minutes or until edges are set. Cool completely on wire rack.
For Chocolate Glaze:
Heat chocolate and butter in small saucepan over low heat, stirring constantly, until melted. Remove from heat.
Stir in powdered sugar and 2 tbsp. boiling water until smooth. Stir in additional water, 1/2 tsp. at a time, until spreadable. Spread warm glaze over tart.
For White Drizzle:
Microwave white baking bar and oil on MEDIUM setting 20-30 seconds; stir until smooth. Drizzle over warm chocolate glaze. Let stand until glaze is set. Remove foil and side of pan before serving.
Please note that some ingredients and brands may not be available in every store.