First, I whisked the egg and sugar until they became frothy and white, then I added vegetable oil, milk, vanilla, baking powder, and flour little by little in order and mixed them, obtaining a classic cake mixture.
Then 2 distributed the cake batter in a separate bowl.
For my pistachio mixture, I added 1 tea glass pistachio powder and for the cocoa mixture, I added 1 tablespoon cocoa powder and mixed them. 2 I put the separate cake mixtures into piping bags separately.
I greased my loaf cake tin and transferred my batter into the tin by giving it random shapes, one pistachio and one cocoa, in turn.
I sprinkled coarsely chopped pistachios on top and baked it at 160 -170 degrees in a preheated oven for approximately 40 minutes. I recommend you try it.