- Line an 8x8 baking dish with parchment paper (spray inside of the pan with oil so the paper sticks). 
- Roughly chop the almonds and add them evenly to the baking dish. 
- In a small pan on the stove, add butter, sweeteners, and vanilla extract, over low heat, and stir continuously. 
- Add candy thermometer, keep stirring, and remove the pan from the heat once the thermometer reaches 290 degrees. 
- Stir mixture well and pour evenly on top of the almonds. 
- Place pan in fridge for 5-7 minutes. 
- Meanwhile, place chocolate in the microwave and melt in 30 second increments. 
- Remove pan from fridge and drizzle chocolate on top. 
- Use a spatula to make sure the chocolate covers the entire dish evenly. 
- Add sea salt flakes. 
- Return to the fridge for at least an hour. 
- Once the toffee has completely hardened, lift it out of the pan and break into pieces. 
- Try not to eat all the toffee in one sitting, it's addicting! 
- Store in the fridge in an air tight container for a few weeks.