Line a square tin with parchment paper. Set aside.
Heat a non-stick pan on low flame. Combine butter, sweetened condensed milk and chopped chocolate in it. Increase the heat to medium and keep on stirring continuously.
Cook until the mixture thickens. This will take about 4-5 minutes. Remember to keep stirring continuously, otherwise chocolate will get burnt. Keep adjusting the flame between low & medium.
Once the mixture thickens, add chopped walnuts and mix. Keep stirring for another 1-2 minutes. You will notice that the mixture will start leaving the sides of the pan and will get more thick. Remove from flame. (If you want more chewy fudge, then cook for a few more minutes. The more you cook, the more chewy it will become)
Pour fudge mixture into the tin lined with parchment paper and smooth the surface with a spatula.
Keep it at room temperature for 15-20 minutes. Then refrigerate for 3-4 hours, or till it completely sets. Once set, demould the fudge slab and remove the parchment paper. Cut the fudge into square pieces and serve.
Store in refrigerator. It stays good for about a week.
Video
Notes
•Remember to keep stirring continuously while making fudge. •Always keep the flame on low to medium heat. Never cook the fudge on high flame.•If you want more chewy fudge, then cook for a few more minutes than mentioned in the recipe. The more you cook, the more chewy it will become.•We have added walnuts for the crunch, if you want you may add other nuts or can enjoy this plain without adding any nuts.•Always store it in refrigerator and it stays good for about a week.•You can also use chocolate chips instead of chopped chocolate. We have used milk chocolate but use can also use a combination of dark and milk chocolate.