Preheat the oven to 180° C (365° F) 15 minutes prior.
Grease a round 20 cm (8 inches) or 23 cm (9 inches) cake pan and cover it with a piece of parchment paper. You can also use a 9-inch Bundt cake pan.
Combine flour, salt, and baking powder and sift twice to thoroughly disjoin the flour particles.
Dissolve the Nescafé in boiling water.
Mix the liquid Nescafé with milk.
Beat the eggs and vanilla with an electric mixer for about 4 minutes until it gains more volume.
Add the sugar in little by little and beat for 7-8 minutes until the mixture is bulkier, white, and fluffy.
Add in the milk mixture as the egg is being beat, by the mixer at a slow speed.
Little by little, add the oil.
Add the dry ingredients while mixing in 2-3 steps. With a whisk or silicone spatula, mix them well so they eventually dissolve.
Pour the batter into the cake pan and bake in the oven for 50-70 minutes.
After 40 minutes, do a toothpick test; insert a wooden toothpick in the middle of the cake, if it comes out clean, the cake is ready!
After turning the oven off, leave its door open for 15 minutes, then take out the cake so that the cake doesn’t receive a sudden shock.
When the cake has completely cooled, remove it from the pan.