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1
Mix together condensed milk, egg yolk and butter (no need to melt the butter)
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2
Put on the microwave for about 1 minutes (to melt the butter) and stir well
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3
Put back in the microwave and cook for about 4 minutes.
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4
The condensed milk will start to boil and go up (just like boiling milk) when the condensed milk goes back to the original size, it's ready.
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5
Stir it well and add it to your cake/cupcake or wherever you decide to use it.
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6
Make sure you have a deep enough recipient to cook the condensed milk.
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7
Otherwise it will overflow and make a mess in your microwave.
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8
You can also do this on the stove.
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9
Just make sure you are constantly stirring, otherwise your condensed milk won't be smooth.
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10
This is a cake recipe where I used this frosting: Marsala Cake
