Line an 8x8-inch pan with parchment paper, leaving overhang “handles.”
Chop maraschino cherries and pat them very dry with paper towels.
Add white chocolate, condensed milk, and butter to a saucepan.
Melt on low heat, stirring constantly until 80% melted.
Remove from heat and stir until smooth and silky.
Mix in vanilla, almond extract, and salt.
Gently fold in the cherries—avoid over-mixing to prevent color bleeding.
Pour mixture into the prepared pan and smooth the top.
Add extra cherries or white chocolate drizzle if desired.
Chill in the refrigerator 2–3 hours, until fully set.
Lift fudge out of pan and slice into squares (wipe or warm the knife between cuts).