Peel and slice the Pears.
In an electric mixer bowl, whip up the sugar and butter until you obtain a super creamy and fluffy texture.
Add in the vanilla, lemon zest and eggs. Continue mixing on high speed for a minute until they are well combined.
Add in the baking powder, sifted flour and a pinch of salt. Mix again for about 1 minute. Gradually add 1/4 cup of milk and 1/3 cup oil while mixing on low speed. Mix for another minute on low speed.
Grease or spray a round spring foam baking pan and pour the batter in. Ideally, an 11 x 3 inch is the best size.
After placing the batter in your pan, spread a layer of the sliced pears to cover the whole batter. Sprinkle some cinnamon and the brown sugar on top of the pears.
Bake in a pre-heated 350 degree over for 40 minutes. Cover with an aluminum foil and bake for another 15-20 minutes depending on your oven. Insert a wooden skewer to make sure it's completely clean before removing the cake.
Remove the cake and cover with a kitchen towel to let it cool down. It may take up to 30 minutes to completely cool down. Dust with some confectioner sugar and serve.