01 -
Turn oven on to 175°C. Cover two baking sheets with parchment paper and have them waiting.
02 -
Whisk flour, cream of tartar, baking soda, and salt together in a bowl till blended.
03 -
On medium speed, blend butter with white and brown sugar till soft and airy. That takes about 2 to 3 minutes. Scrape the bowl and mix again quickly.
04 -
Slow mixer to low. Add eggs one by one, then the vanilla. Mix till smooth.
05 -
Pour dry mix into wet slowly. Mix till halfway done. Fold in the toffee bits. Keep mixing till no flour is visible.
06 -
In a small bowl, mix sugar and cinnamon.
07 -
Scoop dough into 1.5 tablespoon (22 ml) balls. Roll each one in cinnamon sugar so it’s covered completely.
08 -
Put the coated dough balls on prepared sheets, leaving 2 inches (5 cm) space. Bake for 8 to 10 minutes until edges firm up and tops puff a little.
09 -
Leave cookies on trays 5 minutes then move them to a wire rack to cool fully.