Cinnamon and oat crumble top and base with a homemade apple butter filling and sliced apple pieces covered in cinnamon and maple syrup for the ultimate apple crumble slice.
Core and chop the apples. Add the apples, brown sugar, cinnamon, allspice, apple cider vinegar, water and vanilla extract to a large, heavy bottomed saucepan. Heat over a medium heat until the apples are very soft, about 20-30 minutes.
Using a stick blender, puree the apple mixture. Alternatively, transfer the mixture to a regular blender and puree.
Cook over a low heat until you have the desired, thick consistency. I cooked them for a further 15 minutes but it may take longer or less depending on your stove top.
Cool completely and store in an airtight container in the refrigerator.
Crumble;
Preheat oven to 180°C (350°F) and grease or line a 9"x13" baking tin with baking paper.
Beat the butter and brown sugar until they are combined but there are still lumps of butter present.
Add the flour, oats, cinnamon and baking powder.
Mix together with your hands until the mixture is nice and crumbly.
Spread ½ to ⅔ of the mixture evenly over the baking tray.
Place in the oven for 10 minutes and prepare the filling.
Filling;
Place the chopped apples, vanilla extract, maple syrup, flour and cinnamon in a bowl and mix together.
Spread the apple butter over the cooked base.
Place over the sliced apple mixture in an even layer.
Mix the chopped pecans through the remaining crumble and sprinkle over the apples.
Bake for 30-35 minutes until it is nice and golden on the top.
Allow it to cool completely before slicing it into bars.