Berries & Walnut Soft Cake

Ingredients for 4 persons
100 gr of butter
2 eggs
100 gr of sugar (This is less sweet recipe. If you love sweetness, the original amount is 160 grams)
0.5 ts of vanilla extract
0.3 ts of baking soda
120 gr of all-purpose flour
For topping
150 gr of frozen or fresh berries ( I used frozen mixed blueberries, raspberries, and blackberries)
0.25 tbsp of sugar
20 gr of walnut, coarsely smashed

How to make

1. Preheat the oven to 180 C. 
2. Prepare a cake form sized 26 cm in diameter with a baking sheet. Set aside.
3. Melt butter and let it cool down.
4. Whisk egg and sugar until it is combined together, but not to become as a peak form.
5. Add in the melted butter, vanilla extract and keep whisking.
6. Add all dried ingredients in and mix together.
7. Pour batter in the prepared cake form.
8. Decorate on the top with the berries and walnut.
9. Sprinkle some sugar at the end.
10. Bake in the oven for 30 minutes. If you use fresh berries, it can take less minutes in the oven. The ready baked cake will turn golden with softly colorful berries. Do not take out the cake from the baking form yet.
11. Let it set and cool down about 15 minutes in room temperature, then put it in the refrigerator for a hour. Cake will be firm consistency, and easy to take out from the baking form. 
12. Do not forget to take out the baking sheet under the cake.  
13. Cake tastes so good and soft even though you serve it cool. Enjoy!