Preheat the oven at 160°C. Prepare a baking pan, grease the baking pan and line it with parchment paper. I used a 22x10 cm oval baking pan. You can also use 25x12 cm
baking pan.

Let the butter and cream cheese be in room temperature until soft enough to process.

Beat the butter first with low speed, soften it. Add cream cheese. Soften the cream cheese and mix well with the butter.

Put in sugar and salt. Use a spatula to mix the sugar with the butter. This way the sugar will not scatter around when mixed with hand mixer.

Beat until well incorporated, starting with low speed, gradually up to high speed.

Scrape the sides of the bowl once in a while.

Beat the butter and sugar until light, pale, and fluffy.

Add 3 eggs one by one while mixing with low speed.

Sieve in flour, baking powder, and baking soda into the batter.

Mix with a spatula first and continue with the mixer. Mix only for a while, only until it is well blended.

Pour half of the batter into the baking pan. Add some strawberry jam in the center. Add another half of the batter. Spoon some strawberry jam on top of the batter. Use a skewer to make marble pattern on the strawberry jam.

Put the baking pan in the preheated oven. Bake for 50-55 minutes.

Take out the pan from the oven and from the pan.

Let the cake cool on the cooling rack before slicing.