Turn on the oven to heat to 180℃ (top/bottom mode) or 170℃ (fan-forced).

Grease the baking pan with butter and dust with flour or line with baking paper.

Wash the pears, peel them, remove the core, and cut the fruit into larger cubes.

Mix the dry ingredients together in a bowl - except for the sugar.

In a second larger bowl, mix the oil, eggs, and sugar.

Add the mixed flour to the bowl and mix - the dough will be very thick - if it's too thick and won't combine, you can add a little milk.

Add the chopped pears to the bowl and mix - the dough will coat them more.

Transfer the dough to the prepared pan.

Transfer the crumble ingredients to a smaller bowl and knead them together with a fork or your fingers.

Sprinkle the crumble over the top of the cake.

Place the pan with the cake in the preheated oven and bake for about an hour - until a skewer comes out clean.

After baking, cool the cake before serving.