Step 1: Prepare your pan. Line an 8x8 inch baking pan with parchment paper, allowing an overhang on the sides. Lightly grease the parchment paper for easy removal.
Step 2: Melt the base. In a large microwave-safe bowl, combine the white chocolate chips, butter, and sweetened condensed milk. Microwave in 30-second intervals, stirring thoroughly after each, until the mixture is completely smooth and melted. This typically takes 1.5 to 2 minutes.
Step 3: Add the flavor. Stir the bubblegum flavoring into the melted mixture until it is well combined and fragrant.
Step 4: Divide and color. Divide the fudge mixture evenly into two separate bowls. Add a few drops of pink gel food coloring to one bowl and stir until you achieve your desired shade. Repeat with the blue gel food coloring in the second bowl.
Step 5: Layer the colors. Spoon alternating dollops of the pink and blue fudge mixtures into your prepared pan.
Step 6: Create swirls. Use a knife or skewer to gently swirl the colors together. Be careful not to overmix, as this can cause the colors to blend too much and lose their distinct 'cloud' effect.
Step 7: Chill the fudge. Place the pan in the refrigerator for at least 2 hours, or until the fudge is firm to the touch.
Step 8: Cut and serve. Once firm, use the parchment paper overhang to lift the fudge out of the pan. Carefully cut into 1-inch squares using a Quality Chef's Knife. Enjoy your whimsical creation!