In a microwave-safe bowl, combine equal parts dark chocolate and butter. Heat for 30 seconds, then stir. Continue heating in 15-second intervals until smooth.

Slowly pour in your choice of dairy-free milk while stirring constantly until creamy and well incorporated.

Gradually sift in powdered sugar, mixing vigorously until thick and smooth. Ensure a lump-free consistency.

Stir in vanilla extract until evenly mixed to enhance flavors.

Line an 8x8-inch baking dish with parchment paper. Pour in the mixture, spreading it out evenly. Tap to eliminate air bubbles.

Refrigerate for at least 2 hours until fully firm.

Remove the fudge using parchment paper, transfer to a cutting board, and slice into squares or bars.