Line an 8 x 8 pan with parchment paper or foil and lightly grease it with cooking spray.
In a medium saucepan, heat the sweetened condensed milk over medium-low heat until hot. Remove from heat.
Add the white chocolate chips, butter, and almond extract. Stir until everything is melted and smooth.
Stir in the sugar cookie mix until well incorporated.
Pour the fudge mixture into the prepared pan and add sprinkles. Gently press the sprinkles in so they adhere.
Cover the pan with plastic wrap or aluminum foil and let it set up in the refrigerator for 4 hours or overnight before cutting into squares.
Notes
If you're concerned about using raw cookie mix, you can heat treat it in the microwave until it reaches 160°F. To do so, put the cookie mix in a bowl and microwave it for 30 seconds. Stir, and repeat for a total of 1-1/2 to 2 minutes, always using 30-second intervals.
Don't let the milk scald or boil; you just want it hot.
Almond extract adds a unique flavor, but you can use vanilla extract or skip it altogether.
If you want sprinkles throughout the fudge, add them when you mix in the cookie mix.
Allow the fudge to come to room temperature before cutting for clean slices.
To get smooth slices, dip a sharp knife in hot water, then wipe it dry before each cut.