Topping (optional):

• 1 Granny Smith apple , quartered, cored, thinly sliced 3 mm / 1/8″ thick (Note 1)
• 1 1/2 tbsp demerara sugar (or turbinado sugar, Note 2)
• 1/4 tsp cinnamon powder

Cinnamon Apple:

• 3 cups diced Granny Smith apple , 1/2” cubes, skin on (approx 2 large apples) (Note 2)
• 1 tsp cinnamon powder
• 3 tbsp brown sugar

Batter – Dry:

• 1 tsp cinnamon powder
• 1/2 tsp ginger powder (Note 3)
• 1/4 tsp allspice (or mixed spice) (Note 3)
• 1 3/4 cups plain / all-purpose flour
• 1 tsp baking powder
• 1/2 tsp baking soda , sifted (Note 4)
• 1/4 tsp cooking / kosher salt

Batter – Wet:

• 3/4 cup brown sugar
• 3/4 cup yogurt , plain unsweetened (sub sour cream), at room temperature (Note 5)
• 2 eggs , at room temperature (Note 5)
• 1/2 cup canola oil (or other neutral flavoured oil)
• 1 tsp vanilla extract

Walnuts (optional):

• 1 cup walnuts , toasted, roughly chopped into 1cm/1/3″ pieces (not too small) (Note 6)