Rebecca excitedly revealed that the cake only contained five ingredients: Cadbury drinking chocolate, almond meal, eggs, butter and caster sugar.
'I've been dealing with this a lot, which is cute at times, but crazy,' she laughed, as the kids chattered non-stop in the background.
'One thing we love to do together as a family is bake. The easiest recipe we love to bake is a flourless chocolate cake.
'It's only got five ingredients in it, you just chuck it in a bowl, mix it and pop it in the oven and it's done.'
Clearly pleased with her creation, Rebecca made sure to post a selfie with herself and the cake at the end of the tutorial.
'It's literally the easiest cake in the world to make,' she told her followers.
'[It] is something we've been enjoying doing together as a family as we adjust to our new routine.'
Before concluding: 'Oh and yep, my twins are like that every single day.'
Earlier this week, Rebecca showed off her fit frame by stripping down to a skimpy black bikini to demonstrate her fake tan application.
The AFL WAG happily danced around her bedroom whilst making sure to bronze every inch of her body.