Quick, easy microwave fudge

Ingredients:

500 g chocolate chips
1 can sweetened condensed milk
60 g butter
1 t vanilla essence
1/4 t salt

Method:

1. Line a square slice tin with baking paper and spray with oil.
2. Place chocolate chips, sweetened condensed milk and butter in a microwave safe bowl.
3. Microwave for 1 minute. 
4. Beat. If the mixture isn't nice and glossy microwave for a further 15 seconds. 
5. Beat. Repeat step 3 if necessary.
6. Add vanilla essence and salt. Beat together.
7. Pour mixture into slice tin and spread evenly.
8. Refrigerate until set.
9. Cut into squares. Makes approximately 36 pieces.