Preheat the oven to 170°C/338°F (fan-forced).
Melt coconut oil in bowl. 2 minutes, 90, speed 1. Time will vary according to temperature of your oil; adjust time as needed.
Add in the sweetener, rapadura and vanilla. Mix to combine. 30 seconds, speed 3.
Weigh in the oats and nuts and combine. 20 seconds, speed 3, reverse.
Add the choc chips and stir in. 20 seconds, speed 2, reverse (or you can use the spatula to mix by hand.)
Line a 18 x 28 cm slice tin and press in the mixture with wet hands nice and firm (make sure it’s really compact).
Bake for 20 minutes.
Cool, refrigerate and chill well before cutting. This helps to get nice crumb free slices. If you cut it without first chilling, it will crumble.