In a medium sauce pan, before heating, add your maple sugar (you can use coconut sugar but we prefer maple sugar), 1 tablespoon of water and vanilla extract. Add butter and turn the heat to medium.
As the sugar begins to melt, immediately begin to stir the mixture with a spatula, in one direction only. You are doing this to prevent any sugar from burning and to help both the butter and sugar to melt evenly. Once most of the sugar and butter has melted, switch to a whisk and gently whisk the mixture together, in one direction, until it is fully emulsified. If you *do not* start whisking right away, the toffee may not come together.
Once it is fully melted and emulsified, stop whisking. Continue to cook the toffee over medium-low heat, without disturbing, until it reaches a temperature of 290 degrees with a candy thermometer. This took us about 10 minutes, but watch to avoid burning.
Turn off heat, and add salt. Slowly whisk until combined.
Carefully pour toffee over matzo. Using an offset spatula spread the toffee evenly.
Continue with step above to spread your chocolate.