Para fazer o bolo, eu misturo farinha, manteiga e um pouco de açúcar.

Para + infinitive is a very common way to express purpose in Portuguese. Here, para fazer o bolo means to make the cake or in order to make the cake.

So the structure is:

• para = for / to
• fazer = to make / to do

This is similar to English to make the cake.

You will see this pattern a lot:

• Para aprender português, eu estudo todos os dias. = To learn Portuguese, I study every day.
• Para viajar, preciso de dinheiro. = To travel, I need money.

After para, Portuguese normally uses the infinitive form of the verb.

So:

• para fazer = to make
• not para faço

That is the standard pattern:

• para comer = to eat
• para estudar = to study
• para dormir = to sleep

A conjugated verb like faço would not fit here because para is introducing a purpose phrase, not a full main clause.

O bolo means the cake, while um bolo means a cake.

Using o bolo suggests that the cake is specific or already understood in context. For example, maybe we are talking about a particular recipe or the cake we are preparing right now.

So:

• fazer o bolo = make the cake
• fazer um bolo = make a cake

Both are possible in Portuguese, but they mean slightly different things, just as in English.

You could absolutely just say misturo.

Portuguese often drops subject pronouns when the verb ending already makes the subject clear. Since misturo is the 1st person singular form, it already tells us the subject is I.

So both are correct:

• Eu misturo farinha, manteiga e um pouco de açúcar.
• Misturo farinha, manteiga e um pouco de açúcar.

Including eu can add emphasis, clarity, or contrast.

For example:

• Eu misturo os ingredientes, e ela assa o bolo. = I mix the ingredients, and she bakes the cake.

Misturo is the present tense, first person singular of the verb misturar.

So:

• misturar = to mix
• eu misturo = I mix

This ending -o is very common for eu in the present tense:

• eu falo = I speak
• eu compro = I buy
• eu preparo = I prepare

In this sentence, eu misturo can sound like a habitual action, a step in a recipe, or something I am doing as part of the process.

In Portuguese, when listing ingredients or talking about substances in a general way, articles are often omitted.

So:

• farinha
• manteiga
• açúcar

sounds natural in a recipe-like context.

This is similar to English, where we also often say:

• I mix flour, butter, and sugar

rather than

• I mix the flour, the butter, and the sugar

If you add articles, it can sound more specific:

• a farinha = the flour
• a manteiga = the butter
• o açúcar = the sugar

That would usually refer to specific ingredients already identified in context.

Because um pouco is followed by de before the noun.

This is the normal structure:

• um pouco de água = a little water
• um pouco de leite = a little milk
• um pouco de açúcar = a little sugar

So the pattern is:

• um pouco de + noun

Without de, it would be ungrammatical here.

Good question. Here, açúcar is being used as an uncountable substance in a general sense, so no article is needed.

• um pouco de açúcar = a little sugar

If you said um pouco do açúcar, that would mean a little of the sugar, referring to some specific sugar already mentioned or physically present.

Compare:

• um pouco de açúcar = a little sugar
• um pouco do açúcar = a little of the sugar

So the sentence is using the general ingredient meaning, which is why de açúcar is correct.

Usually yes, in sentences like this.

Misturar commonly means:

• to mix
• sometimes to combine
• in some contexts, to blend

In a recipe, eu misturo farinha, manteiga e um pouco de açúcar is very naturally understood as I mix flour, butter, and a little sugar.

Depending on context, English might translate it as:

• I mix
• I combine
• I stir together

But mix is the most direct match.

The comma separates the introductory purpose phrase from the main clause:

• Para fazer o bolo, = introductory phrase
• eu misturo farinha, manteiga e um pouco de açúcar. = main clause

This is similar to English punctuation in sentences like:

• To make the cake, I mix the ingredients.

In Portuguese, this comma is very natural and helps readability, especially when the sentence begins with a phrase like para fazer o bolo.

Yes. In spoken Brazilian Portuguese, pra is very common and natural as a contraction of para.

So you may hear:

• Pra fazer o bolo, eu misturo farinha, manteiga e um pouco de açúcar.

This is very common in everyday speech.

The difference is mainly register:

• para = more neutral / standard / formal writing
• pra = more informal / conversational

Both are widely understood in Brazil.