Line a 9" metal springform pan with parchment paper on the bottom.
Melt the chocolate in a microwave safe bowl in 15 second increments, stirring after each microwave burst. Once fully melted, set aside to cool.
In the bowl of a stand mixer, add in the granulated sugar, eggs, vanilla extract, and salt. Use the whisk attachment to mix. Start on low speed, then turn to high speed for 3 minutes until light and fluffy.
Scrape down the sides and bottom of the bowl. Turn the mixer back on to medium speed.
Stream the melted chocolate down the side of the mixing bowl, being careful not to hit the whisk.
Mix briefly until just combined.
Then, stream in the oil and milk on medium speed. Scrape down the sides and bottom of the bowl again.
Sift the all purpose flour, cocoa powder, and baking powder into the liquid ingredients. Hold the whisk attachment in your hand and use it to carefully scoop and mix the dry ingredients into the wet.
Pour in 100 grams of the raspberries and use a rubber spatula to fold the raspberries in as well as scrape the bowl.