Pre-heat the oven to 180⁰C.
Line 2 muffins trays with 18 muffin cases.
Put the wholemeal flour in a bowl and sieve in the plain flour, baking powder, speculaas spice mix and salt, then mix well.
In another bowl whisk together the egg, yogurt and oil.
Mix the sugar, chopped apple and blackberries into the flour mixture and then mix in the oil mixture with a wooden spoon until just combined.
Spoon the mixture into the muffin cases.
Bake for 20 minutes until spring back to the touch or an inserted skewer comes out clean.
Allow to cool for a few minutes before transferring to a wire rack to cool.