Prep. Line an 8x8" casserole dish with parchment paper.
Melt. Add sugar free chocolate chips (3 cups), heavy cream (14 Ounces), and unsalted butter (1/4 cup) to a large microwave-safe bowl. Microwave (note 3) for 1 1/2 minutes at 50% power. Stir ingredients to incorporate. Repeat using 30 second intervals until everything has melted together and your fudge has a smooth texture.
Stir in confectioners erythritol (3/4 cup), vanilla (1 teaspoon), and chopped nuts (1 1/2 cup).
Set. Pour fudge into your prepared baking dish and smooth the top using a rubber spatula. Place in the fridge and allow fudge to set for at least 3 hours. Cut fudge into 16 pieces and enjoy!
Notes
Chocolate - I love Lily's chocolate chips for this fudge.
Sweetener - This recipe was measured with Lakanto or Swerve. If using a different brand of erythritol, know that they're often 70% as sweet and you'll want to adjust accordingly. A simple taste test will do the trick!
Mix-Ins Ideas! (Optional + not included in nutritional info):
Keto marshmallows
Freeze-dried fruits
Shredded and unsweetened coconut
Additional chocolate chips
Microwave or stovetop - You can melt the butter and chocolate chips together using a double boiler instead. I use a heat-safe bowl nestled into a saucepan full of water.
Nutritional information is based on 1 piece if you cut this fudge into 16 pieces. It was calculated using Lily's chocolate chips: