Your shopping list might not seem as overwhelming if you generally stock some of the following items. Just pay attention to how much you bake. Many items in pantry and refrigerator expire (some sooner than later) so if you are not baking often, wait and shop as you need. But if you are an avid baker, go for it.
Pantry: flour, sugar, brown sugar (more light than dark) baking soda, baking powder, salt, cocoa (natural and unsweetened, black cocoa), chocolate chips and chocolate bars (milk, semi, white, bitter, extra bitter, unsweetened) cornstarch, whole wheat flour, cake flour, oatmeal (quick cooking and old-fashioned), canola or vegetable oil, dried fruits, a variety of nuts, molasses, graham cracker crumbs, marshmallows, shredded and flaked coconut, spices (cinnamon, ground ginger, allspice, ground cloves, cardamom, ground nutmeg), instant espresso powder, vanilla extract, and vanilla beans, sweetened condensed milk, evaporated milk…
Fridge: large eggs, unsalted butter, sour cream, plain yogurt, buttermilk, milk, heavy cream, block cream cheese, lemons and other assorted fruits
Freezer: frozen berries and stone fruits, puff pastry, fillo dough, ice cream