Blueberry sandwich shortcake

I remember when I first came into contact with baking, I passed those who saw the word butter in the ingredients. After searching for a long time, there were very few who didn't use butter! I like making bread because the fat content in most breads is no more than 10% of the flour, so I can still accept it. But although bread is good, it takes too much time. It takes no more than five or six hours to make a good bread from preparation to baking. In addition to taking my children to do housework in my spare time, I have really little time. In order to try more varieties in an effective time, I have tried more soda biscuits, cupcakes, angel cakes, peach cakes, puffs, egg tarts...... no less than 20 kinds, and try to use vegetable oil if there is grease! I have also made cookies twice, but they have been reduced again and again due to my scruples about butter. The effect is of course not satisfactory. Brownie is a cake that I dare not try after being in the baking business for half a year. Of course, the cake is The bigger the oil, the better it is, but how great it would be if I ate it without getting fat